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By using Ganita Prakash Class 7 Solutions and Part 2 Chapter 6 Constructions and Tilings Class 7 Question Answer, students can improve their problem-solving skills.

Class 7 Maths Ganita Prakash Part 2 Chapter 6 Solutions

Class 7 Maths Constructions and Tilings Solutions

Class 7 Ganita Prakash Part 2 Chapter 6 Solutions Constructions and Tilings

Figure it Out (Page: 140)

Question 1.
When constructing the perpendicular bisector, is it necessary to have the same radius for the arcs above and below XY? Explore this through construction, and then justify your answer.
[Hint 1: Any point that is of the same distance from X and Y lies on the perpendicular bisector.
Hint 2: We can draw the whole line if any two of its points are known.
Solution:
Draw a line segment XY.
Choose distances k and k’ which are slightly greater than half of the distance XY.
With centres at X and Y , draw arcs of radius ‘k’ below XY.
With centres at X and Y , draw arcs of radius ‘k” below XY.
Let the arcs above XY intersect at A , and the arcs below XY intersect at B.
Join A and B. Let AB intersect XY at O.
Join AX, AY, BX, and BY.
∆ABX and ∆ABY are congruent because AX = AY = k, BX = BY = k, and AB is common.

∴ ∠XAO = ∠YAO
∆AOX and ∆AOY are congruent because AX = AY = k, ∠XAO = ∠YAO, and OA is common.
∴ OX = OY
and ∠AOX =∠AOY
Also, ∠AOX +∠AOY = 180°
∴ 2 ∠AOX = 180°
or ∠AOX = 90°
∴ OX = OY
and ∠AOX = ∠AOY = 90°.
∴ AB is the perpendicular bisector of the line XY. Here, A and B are points that are of the same distance from X and Y.
Thus, any point that is of the same distance from X and Y lies on the perpendicular bisector.

Question 2.
Is it necessary to construct the pairs of arcs above and below XY? Instead, can we construct both the pairs of arcs on the same side of XY? Explore this through construction, and then justify your answer.
Solution:
Draw a line segment XY.
Choose distances k and k’ which are slightly greater than half of the distance XY.
With centres at X and Y, draw arcs of radius ‘k’ above XY.
With centres at A and Y, draw arcs of radius ‘k” above XY.
Let the arcs intersect at the points A and B.
Join A and B and produce this line to intersect XY at O.
Join AX, AY, BX, and BY.

∆ABX and ∆ABY are congruent because AX = AY = k, BX = BY = k’, and AB is common.
∴ ∠XAO =∠YAO
∆AOX and ∆AOY are congruent because AX = AY = k, ∠XAO=∠YAO, and OA is common.
∴ OX = OY
and ∠AOX =∠AOY
Also, ∠AOX + ∠AOY = 180°
∴ 2 ∠AOX = 180°
or
∠AOX = 90°
∴ OX = OY
and ∠AOX =∠AOY = 90°
∴ AB is the perpendicular bisector of the line XY.
Here, the pairs of arcs are both on the same side of XY.
∴ It is not necessary to construct the pairs of arcs above and below XY.

Question 3.
While constructing one pair of intersecting arcs, is it necessary that we use the same radii for both of them ? Explore this through construction, and then justify your answer.
Solution:
Draw a line segment XY.
With centres at X and Y, draw arcs of unequal radii, say k and k’.
Let the arcs intersect at the point A.

Let PQ be the perpendicular bisector of XY.
Let R be any point on PQ.
Join RX and RY.
ΔROX and ΔROY are congruent, because OX = OY, ∠ROX =∠ROY, and OR is common.
∴ RX = RY
∴ For any point R on the perpendicular bisector, we have RX = RY.
∴ Every point on the perpendicular bisector is equidistant from X and Y.
Since AX ≠ AY, the point A is not on the perpendicular bisector.
Thus, to construct a perpendicular bisector, we must use the same radius for both arcs of a pair of arcs.

Question 4.
Recreate this design using only a ruler and compass –

Solution:
Let ABCD be a square. We draw perpendicular bisectors of the sides AB and BC as shown in the figure.

Let the perpendicular bisectors intersect the square at the points P, Q, R, and S.
With centres at P, Q, R, and S , draw semicircles in the square with radius equal to AP.
Colour the boundary of the design using a coloured pencil.
This will make the design stand out from the supporting lines and curve.

Figure it Out (Page: 142)

Question 1.
Justify why A B in the figure given below is the perpendicular bisector of the line XY.

Solution:

In the above figure, XAY and XBY are two positions of the rope.
Points A and B are at the midpoint of the rope.
∴ We have AX = AY = BX = BY.
∆AXB and ∆AYB are congruent, because AX = AY, BX = BY, and AB is common.
∴ ∠XAO = ∠YAO
∆AXO and ∆AYO are congruent, because AX = AY, ∠XAO = ∠YAO, and AO is common.
∴ OX = OY
and ∠XOA =∠YOA.
Also, ∠XOA +∠YOA = 180°
∴ 2 ∠XOA = 180°
or ∠XOA = 90°
∴ OX = OY
and ∠XOA =∠YOA = 90°
∴ By definition, AB is the perpendicular bisector of the line XY.

Question 2.
Can you think of different methods to construct a 90° angle at a given point on a line using a rope?
Solution:
In this construction, we shall use the 3-4-5 principle that if the sides of a triangle are in the ratio 3 : 4: 5, then the angle opposite to the longest side is 90°.
In the figure, the sides AB, BC, and CA are in the ratio 3 : 4 : 5 and the angle

B, opposite to the longest side AC, is equal to 90°.
‘Construction:
Draw a line XY and take any point A on it.
We shall construct a 90° angle at point A , using a rope.

Fix a small pole at point A.
Take a rope and mark it at 0 units, 3 units, 8 units, and 12 units.
Attach the 0 unit mark and 12 unit mark of the rope at A.
Attach the 3-unit mark at point B on the line XY, with the help of a pole at B.
Now hold the 8-unit point of the rope and extend it away from XY so that both sides of this point are tight.
Place a pole at this point and call this point C, as shown in the figure.
In the ∆ABC, the sides are 3 units, 4 units, and 5 units.
The angle opposite to the longest side is ∠A.

∴ By the 3-4-5 principle, ∠A is equal to 90°.
∴ The line AC is perpendicular to the line XY at the given point A.

Figure it Out (Page: 144-145)

Question 1.
Construct at least 4 different angles. Draw their bisectors.
Solution:
We draw 4 different angles, ∠ABC, ∠DEF, ∠GHI, and ∠JKL, as shown below:


We shall draw the bisectors of the above angles.
With centres at B, E, H, and K, draw arcs intersecting the arms of the angles.
With centres at A’, C’, D’, F’, G’, I’, J’, and L’, draw arcs of the same radius so that the arcs intersect at points B’, E’, H’, and K’.
Join BB’, EE’, HH’, and KK’.
In the above figure:
BB’ is the bisector of ∠ABC
EE}’ is the bisector of ∠DEF
HH’ is the bisector of ∠GHI
KK’ is the bisector of ∠JKL.

Question 2.
Construct the 8-petalled figure shown below.

Solution:
Draw a line AB. With centres at A and B, draw arcs of equal radius above and below the line AB. Let the arcs intersect at the points C and D. Join C and D. Let AB and CD intersect at O. Draw the bisectors of ∠BOC, ∠COA, ∠AOD, and ∠DOB as shown in the figure.

Draw a circle with centre at O and radius equal to the length of a petal in the given figure.
Draw dots at the points of intersection of the circle with the lines. Using the
dots and the centre of the circle, draw the petals as shown in the given figure.
In the next step, we erase the extra lines and arcs. The above figure looks as given below:bv

This is the required 8-petalled figure.

Question 3.
In the process of angle bisection, if arcs of equal radius are drawn on the other side, as shown in the figure, will the line
OC still be an angle bisector? Explore this through construction, and then justify your answer.

Solution:
Let ∠XOY be any angle. With centre at O, draw an arc intersecting the lines OX and OY at A and B respectively.
With centres at A and B, draw arcs of the same radius so that the arcs intersect at a point, say C.

Join AC, BC, and OC. Extend CO to CD.
We have OA = OB and AC = BC.
In ∆OAC and ∆OBC, we have OA = OB, AC = BC, and OC is common.
∴ ∆OAC ≅ ∆OBC (Using SSS rule)
∴ ∠AOC = ∠BOC
∴ 180°-∠AOC = 180° – ∠BOC
∴ ∠AOD = ∠BOD
∴ Line OD is the bisector of the angle∠XOY.
∴ Line OC is the bisector of the angle∠XOY.

Question 4.
What are the other angles that can be constructed using angle bisection? Can you construct 65.5° angle?
Solution:
By using the angle bisector method, we can bisect any given angle.
Using a ruler and compass, we know the method of making a 90° angle on a line.
We have \(\frac{90}{2}\) = 45° and \(\frac{45}{2}\) = 22.5°.
∴ By using an angle bisector, we can make angles of 45° and 22.5°.
Also, 90°+45°=135°, 90°+22.5°=112.5°, 45°+22.5° = 67.5°.
∴ We can also construct angles 135°, 112.5°, and 67.5° using the angle bisector.
∴ By using angle bisector, we cannot construct angle of 65.5°.

Question 5.
Come up with a method to construct the angle bisector using a rope.
Solution:
Let ∠XOY be the given angle. Fix a small pole at the point O. Take a rope and make a loop at one end. Mark a point at some distance on the rope. Fix the loop of the rope at the pole at O and rotate the rope from OX to OY. Mark points A and B at a fixed distance mark on the rope. Fix small poles at A and B. Take a rope and make loops on both ends. Fix the loops of this piece of rope with poles at A and B. Mark the midpoint of this rope and hold the rope at the midpoint. Make both ends of the rope tight and mark the point at the midpoint of the rope. Let this point be M. Join AM, BM, and OM.

We have OA = OB and AM = BM.
In ∆OAM and ∆OBM, we have OA = OB, AM = BM, and OM is common.
∴ ∆OAM = ∆OBM
∴ ∠AOM =∠BOM
∴ ∠XOM =∠YOM
∴ OM is the bisector of the given angle ∠XOY.

Question 6.
Construct the following figure:

How do we construct the petals so that they are of the maximum possible size within a given square?
Solution:
Draw a line and take points A and B on it. With A and B as centres, draw semicircles intersecting the lines at the points C, D, E, and F.
With centres at C and D, draw arcs of equal radius to intersect at the point G. With centres at E and F, draw arcs of equal radius to intersect at the point H. Join AG and BH. Take point I and J on AG and BH, respectively, so that AI = BJ = AB. Join I and J.

Here ABJI is a square. Using a ruler and a compass, find perpendicular bisectors of the sides AB and BJ.
With centres at K, L, M, and N, draw semicircles in the square with radius equal to AK.
Now, we erase the extra lines and arcs.
The above figure looks as given below:

This is the required figure with 4 petals in a square.
Here we have drawn 4 semicircles in the square, so that the petals are of the maximum possible size.

Figure it Out (Page: 147)

Question 1.
Construct at least 4 different angles in different orientations without taking any measurement. Make a copy of all these angles.

Solution:
The following are the given angles:

We shall make a copy of each of the above angles one by one.
Angle (i): Draw a line A’B’ along the direction of the line AB. With centre at B and B’, draw arcs of equal radius. Let the arc intersect AB and BC at M and N, respectively.
Let the arc intersect A’B’ at M. Measure MN using a compass. Transfer this length on the arc from M’ to get M’N’ = MN. Join B’ and N’.

∠A’ B’ C’ is the required angle.
Angle (ii): Draw a line D’E’ along the direction of the line DE. With centres at E and E’, draw arcs of equal radius. Let the arc intersect DE and EE at O and P, respectively.
Let the arc intersect D’E’ at O’. Measure OP using a compass. Transfer this length on the arc from O’ to get O’ P’ = OP. Join E’ and P’.

∠D’ E’ F’ is the required angle.
Angle (iii): Draw a line G’H’ along the direction of the line GH. With centres at H and H’, draw arcs of equal radius. Let the arc intersect GH and HI at Q and R, respectively.

Let the arc intersect G’H’ and at Q’. Measure QR using a compass. Transfer this length on the arc from Q’ to get Q’R’ = QR. Join H’ and R’.
∠G’ H’ I’ is the required angle.
Angle (iv): Draw a line J’K’ along the direction of the line JK. With centres at K and K’, draw arcs of equal radius. Let the arc intersect JK and KL at S and T, respectively.
Let the arc intersect J’K’ at S’. Measure ST using a compass. Transfer this length on the arc from S’ to get S’T’ = ST.

Join K’ and T.
∠J’ K’ L’ is the required angle.

Question 2.
Construct the following figure:

Solution:
We name the vertices of the given figure as A, B, C, D, E, F, G.
Draw a line A’B’ equal to AB and along the direction of the line AB. With centre at B’. Draw an arc of radius A’B’. Measure AC using a compass. Transfer this length on the arc from A’ to get A’C’ = AC. Join B’ and C’. Shade this sector as shown in the given figure.

With centre at C’, draw an arc of radius B’C’.
Measure BD using a compass. Transfer this length on the arc from B’ to get B’D’ = BD. Join C’ and A’.
With centre at D’, draw an arc of radius C’D’.
Measure CE using a compass. Transfer this length on the arc from C’ to get C’E’ = CE. Join D’ and E’. Shade this sector as shown in the given figure.
With centre at E’, draw an arc of radius D’E’.
Measure DF using a compass. Transfer this length on the arc from D’ to get D’ F’ = DF. Join E’ and F’.

With centre at F’, draw an arc of radius E’F’.
Measure EF using a compass. Transfer this length on the arc from E’ to get E’ G’ = EG. Join F’ and G’. Shade this sector as shown in the given figure.
Erase the extra arcs from the figure constructed to get the required figure.

Figure it Out (Page: 148)

Question 1.
Construct 4 pairs of parallel lines in different orientations.
Solution:
Let AB be a given line; we shall draw a line parallel to the line AB. Draw a line CD intersecting the line AB. Choose a point P on the line CD. We shall draw a line parallel to AB and passing through P.

With centres at E and P, draw arcs of equal radius. Measure FG using a compass. Transfer this length on the arc from H to get HI}=FG}. Join P and I and extend this line on both sides.
Here, CD is a transversal, and the corresponding angles ∠PEB and ∠CPK are equal.
∴ The lines AB and JK are parallel lines.
Similarly, we can draw three other pairs of parallel lines.

Question 2.
Construct the following figure:

Solution:
The given figure consists of 8 rhombuses.
Since \(\frac{360°}{8}\) = 45°, the acute angle between the adjacent sides of the rhombus is 45°. We shall form 8 rhombuses of the same size and place them together to form the given figure. Draw a line and take a point A on it. With centre at A , draw a semicircle. With centres at B and C, draw arcs of equal radius. Let the arcs intersect at point D. Join AD.
Now, we shall draw the bisector of angle ∠CAD. With centres at C and E , draw arcs of equal radius. Let the arcs intersect at point F. Join AF.
With centre at A, draw an arc intersecting AC and AF at G and H respectively. With centres at G and H, draw arcs of equal radius equal to AG. Let these arcs meet at I. Join AI. Here, AGIH is a rhombus with base angle 45°.

Erase the extra arcs and lines, colour the upper triangles AHI using a colour pencil, as shown in the following figure:

Using a tracing paper, we make 8 replicas of this figure and place them together without any gaps to get the required figure.

Figure it Out (Page: 151)

Question 1.
Use support lines in the given figure to construct a pointed arch. Make different arches by changing the radius of the arcs.

Solution:
The following is the given figure:

Draw a vertical line B’D’. With centres at B and B’, draw arcs of equal radius.

Measure RS using a compass. Transfer this length on the arc from S’ to get R’ S’ = RS. Join B’ and R’ and extend this line. Make B’A’ equal to BA.
Measure ST using a compass. Transfer this length on the arc from S ‘ to get ST = ST. Join B’ and T’ and extend this line. Make B’C’ equal to BC. Using a compass, find the midpoints M and N of A’B’ and B’C’ respectively. On the lines A’M, MB’, B’N, and NC’, draw similar arcs as shown in the figure.
Erase the extra letters,
lines, and arcs to get the required pointed arch with given support lines.

Question 2.
Make your own arch design.
Solution:
Draw a vertical line AB. With the centre at A, draw an arc. With centre at C, draw an arc intersecting the arc at D and E. Join AD and AE and extend these lines.

Take points F on AD and G on AE such that AF = AG. Let M and N be the midpoints of AF and AG, respectively. Using a compass, draw semicircles on the lines MF, AM, AN, and NG.

Erase the extra letters, lines, and arcs to get the required arch design.

Figure it Out (Page: 154-155)

Question 1.
Construct the following figures:

Solution:
(a) Draw a line and take points A and B on it. Draw perpendiculars at A and B below the line using a ruler and a compass as shown in the figure.

Draw equal lines AC and BD. Find the mid-point M of the line AB. With centres at A and B and radius AM, draw arcs as shown in the figure.

Erase the extra lines, arcs, and letters to get the required figure of an inflexed arc as shown above.

(b) This figure is called the ‘Flower of Life’. Draw a circle. This is called the central circle of the required figure. Take any point A on the circumference and draw an arc of the same radius as that of the circle outside the circle and touching its circumference at B and C With centre at B, draw an arc of the same radius outside the circle and touching its circumference. Repeat the process and complete the pattern as shown below:

Erase the extra arcs and letters to get the required figure of a ‘Flower of Life’ as shown below.

(c) Draw a circle. Take any point A on the circumference and draw an arc with centre at A and radius that to the circle’s and intersecting the circle at B

With the centre at B and the same radius, draw an arc intersecting the circle at C Repeat this process and get points of intersection D, E, and F. Join the lines as shown in the figure.

Erase the arcs and letters to get the required figure as shown above.

(d) Draw a circle. Take any point A on the circle and draw an arc of the same radius as that of the circle intersecting the circle at B With B as centre, draw an arc of the same radius intersecting the circle at C.

Repeat this process and find points D, E, and F Join O and A Find the mid-point of OA Let M be the midpoint of OA With centres at A, B, C, D, E, and F, draw circles of radius equal to OM.

Erase the extra lines, arcs, and letters to get the required figure as shown above.

(e) Draw a circle. Take any point A on the circle and draw an arc with centre at A and radius OA , intersecting the circle at B With the centre at B and the same radius, draw an arc intersecting the circle at C.

Repeat this process and get points of intersection D, E, and F Draw a circle with centre O and radius twice OA Join OA and extend it to intersect the outer circle at A’. Similarly, draw other extended lines.
Join the lines as shown in the figure. There are 5, 7, 7, 5 triangles in Ist, IInd, IIIrd, and IVth rows respectively.
Join the vertices of each triangle to the centre of the respective triangle. Erase the extra lines, arcs, and letters to get the required figure.

Question 2.
Optical Illusion: Do you notice anything interesting about the following figure? How does this happen? Recreate this in your notebook.

Solution:
Draw a circle. Take any point A on the top of the circle and draw an arc with centre at A and radius as that of the circle and intersecting the circle at B.

With the centre at B and the same radius, draw an arc intersecting the circle at C Repeat this process to get points of intersection D, E, and F. Join
Draw three equal circles with wedges removed at A, C, and E as shown above.
Erase the extra arcs, circle, and letters to get the required figure as shown above.

The above figure is called the Kanizsa triangle. The three circles with wedges removed and three V-shaped angles are arranged in such a way that the brain perceives a white equilateral triangle pointing upward-even though no such triangle is actually drawn.

Question 3.
Construct this figure.

[Hint: Find the angles in this figure.]
Solution:
Draw a circle. Take any point A on the top of the circle and draw an arc with centre at A and radius as that of the circle and intersecting the circle at B.

With the centre at B and the same radius, draw an arc intersecting the circle at C. Repeat this process to get points of intersection D, E, and F. Join the lines as shown in the figure.

Erase the extra arcs, circle, and letters to get the required figure as shown above.

Question 4.
Draw a line 1 and mark a point P anywhere outside the line. Construct a perpendicular to the given line 1 through P.
[Hint: Find a line segment on 1 whose perpendicular bisector passes through P.]
Solution:

Draw a line 1 and take a point P outside 1. With centre P, draw an are so that it cuts the line 1 at two points, say A and B. We shall find the perpendicular bisector of the line segment AB. With centres at A and B , draw arcs of equal radius above and below AB. Let the arcs intersect at the points C and D. Join CD and extend it, if P is not on this line. The line CD is perpendicular to the given line 1 and passes through the given point P.

Figure it Out (Page: 156)

Question 1.
How can the tangram pieces be rearranged to form each of the following figures?

Solution:
In order to solve this problem, we prepare 10 sets of 7 tans obtained from a tangram-based shape given below:

Figure it Out (Page: 160)

Question 1.
Is the following tiling possible?

Solution:
The given tiles can be used for tiling the region. The tiling shall use 4 tiles of the given shape.

Question 2.
Is the following tiling possible?

Solution:
The black-and-white region of the given region is shown in the figure. This region is to be tiled by tiles of the form shown in the figure.

In the given region, there are 30 black squares and 32 white squares. Since these numbers are not equal, the given region cannot be tiled by using the tiles of the given shape.

Reviewing the Class 9 SST Extra Questions and Class 9 SST Chapter 4 Early Humans and Beginning of Civilisation Extra Questions and Answers before exams can boost your confidence.

Early Humans and Beginning of Civilisation Class 9 Extra Question Answer

Class 9 SST Chapter 4 Early Humans and Beginning of Civilisation Extra Questions

Early Humans and Beginning of Civilisation Class 9 Very Short Question Answer

Question 1.
“The invention of writing marked a turning point in human history.” Explain the statement by giving any two reasons.
Answer:
The invention of writing marked a turning point in human history because

• It enabled people to record laws, events, trade, and important historical information
• It made the dating of events more accurate and helped historians understand ancient societies.

Question 2.
“Stone tools are considered important evidence for understanding early humans.” Explain the statement with any two points.
Answer:
Stone tools are considered important evidence because

• They show how early humans hunted, gathered food, and protected themselves.
• They help archaeologists understand the technology, skills, and lifestyle of prehistoric humans.

Question 3.
What is meant by cultural evolution?
Answer:
Cultural evolution refers to the gradual development of human life through changes in technology and lifestyle. Humans developed better tools and survival techniques. They gradually adopted agriculture, animal domestication, and settled life.

Question 4
“The Neolithic Revolution changed the lifestyle of human beings.” Explain the statement with any two points.
Answer:
The Neolithic Revolution changed human life because

• People shifted from hunting and gathering to farming and animal domestication.
• Permanent settlements, pottery, and food production led to the growth of villages and civilisation.

Question 5.
Why is Mehrgarh considered an important archaeological site?
Answer:
Mehrgarh is considered an important archaeological site because it is the earliest known agricultural village in the Indian subcontinent, and it provides evidence of farming, animal domestication, granaries, and permanent settlements.

Question 6.
“Standard systems of weights and measures were essential for the Harappans.” Explain the statement with any two points.
Answer:
Standard systems of weights and measures were essential because

• They ensured fairness and accuracy in trade and commercial activities.
• They reflected the advanced planning and economic organisation of the Harappan Civilisation.

Question 7.
“River valleys played an important role in the growth of early civilisations.” Explain the statement with any two points.
Answer:
River valleys played an important role because

• They provided fertile soil and water for agriculture.
• They supported transport, trade, and the growth of permanent settlements and cities.

Question 8.
Why are cuneiform tablets considered important historical sources?
Answer:
Cuneiform tablets are valuable historical sources because they contain records of laws, trade, administration, literature, myths and religious beliefs. These written records provide historians with detailed information about the political, economic, social, and cultural life of ancient Mesopotamian civilisation.

Question 9.
“The Nile River contributed greatly to the development of Egyptian civilisation.” Explain the statement with any two points.
Answer:
The Nile River contributed greatly to Egyptian civilisation because

• Its annual floods deposited fertile soil suitable for agriculture.
• It supplied water for irrigation, transport and the growth of permanent settlements.

Question 10.
“The Chinese script is called a logographic script.” Explain the statement.
Answer:
The Chinese script is called a logographic script because

• Each character represents a complete word or meaningful unit instead of a sound.
• This writing system helped preserve Chinese history, administration, and cultural traditions for thousands of years.

Early Humans and Beginning of Civilisation Class 9 Short Question Answer

Question 1.
“Early humans gradually developed better tools to meet their changing needs.” Explain the statement with suitable examples.
Answer:
Early humans gradually developed better tools to meet their changing needs in the following ways.

• During the Palaeolithic Age, they used large stone tools such as hand axes, cleavers, choppers, and scrapers for hunting animals, cutting meat, digging out tubers, and breaking bones.
• In later periods, they developed smaller microliths, bows and arrows, polished stone tools, and farming implements. These improved tools made hunting, food processing, agriculture and other daily activities more efficient.

Question 2.
Describe the main cultural developments that took place during the Palaeolithic Period.
Answer:
The Palaeolithic Period witnessed several important cultural developments.

• Early humans developed symbolic communication by making paintings on cave walls and rock shelters. They also decorated their bodies using natural pigments and created beads from stone, bone, and shells for personal ornamentation.
• They used burins to engrave designs on bones and shells and fixed microblades into handles to make stronger and more efficient tools. These developments reflected their increasing creativity and technological skills.

Question 3.
How did the Mesolithic Period differ from the Palaeolithic Period?
Answer:
The Mesolithic Period differed from the Palaeolithic Period in several ways.

Aspect	Palaeolithic Period	Mesolithic Period
Climate	Cold climate with extensive ice sheets.	Warmer climate with expanding forests and grasslands.
Tools	Large stone tools such as hand axes, cleavers and choppers were used.	Small stone tools called microliths were developed for hunting and fishing.
Food	People depended mainly on hunting wild animals and gathering fruits, roots and tubers.	People hunted small animals, caught fish, gathered wild grains, and used a wider variety of food resources.

Question 4.
Explain the importance of seals and pottery in the Early Harappan Phase.
Answer:
Seals and pottery were important features of the Early Harappan Phase in the following ways.

• Pottery was produced in different shapes and designs, reflecting regional artistic traditions and the growth of specialised crafts. It was widely used for storing, cooking, and transporting goods.
• Seals with geometric patterns and animal motifs were used for identification, administration, and trade. They also represent the earliest development of the Harappan script, which later became an important feature of the Mature Harappan Civilisation.

Question 5.
Describe the social and economic life of the Sumerians.
Answer:
The Sumerians developed a well-organised social and economic system. Society included kings, priests, merchants, craftsmen, farmers and labourers. Temples played an important role in administration, religion, agriculture and trade and were controlled by priests. Farming was the main occupation, supported by canal irrigation. Many people also worked as potters, metalworkers, textile makers and traders. Their organised economy helped the growth of prosperous city-states.

Question 6.
Explain the importance of the Rosetta Stone in the study of Egyptian civilisation.
Answer:
The importance of the Rosetta Stone in the study of Egyptian civilisation is

• It contained the same inscription written in three different scripts, including Greek, which scholars could already read. This made it possible to compare the texts.
• In 1822, Jean-François Champollion successfully deciphered Egyptian hieroglyphics using the Rosetta Stone.
• As a result, historians were able to understand Egyptian records, religion, administration, and culture much better.

Question 7.
Describe the important contributions of the Chinese civilisation to the world.
Answer:
The important contributions of the Chinese civilisation to the world are

• It developed a logographic writing system, introduced paper currency, and established a civil service examination system for selecting government officials.
• The Chinese mastered bronze metallurgy, produced fine jade objects, expanded silk production through the Silk Route, and built the Great Wall of China to defend their empire. These achievements greatly influenced later civilisations.

Question 8.
“The four Bronze Age civilisations developed independently but maintained their own unique identity.” Justify the statement.
Answer:
The four Bronze Age civilisations shared common features but also developed unique identities because

• All four grew in fertile river valleys, practiced agriculture, established organised governments, and developed writing systems that supported administration and trade.
• However, each civilisation had distinct achievements. The Harappans were known for planned cities and standard weights, Mesopotamians for cuneiform writing, Egyptians for pyramids and mummification, and the Chinese for oracle bones, the Great Wall, and the Silk Route.

Early Humans and Beginning of Civilisation Class 9 Long Question Answer

Question 1.
“The journey of human beings from hunter-gatherers to settled farmers was one of the greatest transformations in history.” Explain the statement by describing the major changes that took place during this transition.
Answer:
The journey from hunter-gatherers to settled farmers brought major changes in human life in the following ways.

• Early humans gradually shifted from depending on hunting and gathering to producing food through agriculture and animal domestication. This provided a more regular and reliable food supply.
• People started living in permanent villages instead of moving from place to place. They built houses, stored surplus food and domesticated animals such as cattle, sheep and goats.
• They also developed polished stone tools, pottery, weaving and food-processing techniques. These changes encouraged population growth, division of labour and trade. Permanent settlements eventually developed into villages and laid the foundation for the rise of the earliest civilisations.

Question 2.
“Archaeological discoveries have helped historians reconstruct the story of early humans.” Explain the statement with suitable examples.
Answer:
Archaeological discoveries have played a vital role in reconstructing early human history in the following ways.

• Archaeologists study stone tools, fossils, bones, pottery, ornaments, and ancient settlements to understand how early humans lived. These remains provide evidence about their food habits, occupations, technology and social life.
• Fossils help trace human evolution, while stone tools show the development of hunting, farming, and food processing. Cave paintings reveal the cultural and artistic activities of early humans.
• Archaeologists also recreate and use similar tools to understand how they were made and used. Since the prehistoric period has no written records, archaeological evidence remains the most reliable source for understanding the lives of early humans.

Question 3.
“The Sindhu-Sarasvati Civilisation was one of the most advanced civilisations of the ancient world.” Justify the statement with suitable examples.
Answer:
The Sindhu-Sarasvati Civilisation was highly advanced in the following ways.

• It had well-planned cities with proper roads, drainage systems, reservoirs, granaries and organised settlements. The Harappans followed standard systems of weights and measures, showing advanced trade and administration.
• They were skilled farmers and craftsmen who produced pottery, beads, shell ornaments and copper tools. They also developed seals bearing the Harappan script.
• Their trade extended to distant regions such as Mesopotamia. Efficient water management at sites like Dholavira and the dockyard at Lothal demonstrate their remarkable engineering skills.
• These achievements reflect a well-organised and prosperous civilisation.

Question 4.
Compare the Mesopotamian, Egyptian and Chinese civilisations on the basis of their writing systems, achievements and administration.
Answer:
The comparison between Mesopotamian, Egyptian and Chinese civilisations based on their writing systems, achievements and administration is

Basis	Mesopotamian Civilisation	Egyptian Civilisation	Chinese Civilisation
Writing System	Cuneiform script written on clay tablets	Hieroglyphic script written on papyrus and monuments	Logographic script written on oracle bones and later materials
Major Achievements	Canal irrigation, wheel, sailboat and base-60 number system	Pyramids, mummification and 365-day calendar	Bronze metallurgy, Silk Route, paper currency and Great Wall of China
Administration	City-states ruled by kings and temple authorities	Pharaohs ruled with organised officials	Dynasties governed through trained officials selected by examinations

Question 5.
“Bronze Age civilisations made significant contributions that continue to influence the modern world.” Explain the statement with suitable examples.
Answer:
The significant contributions of Bronze Age civilisations that continue to influence the modern world are

• They developed agriculture, organised governments, writing systems, trade networks and planned urban settlements. Their innovations improved administration and economic life.
• The Harappans introduced planned cities and standard weights, the Mesopotamians developed cuneiform writing and the base-60 system, the Egyptians built pyramids and created an accurate calendar, while the Chinese introduced paper currency, the civil service examination system and expanded silk trade.
• Many modern ideas related to administration, mathematics, architecture, writing and trade have their roots in these early civilisations, making them an important part of human history.

Early Humans and Beginning of Civilisation Class 9 Case Based Questions

Question 1.
Read the given source and answer the questions that follow.
The Chinese civilisation flourished along the rivers, the Huang He (Yellow River) and the Yangtze. These two river valleys were also centres of early Chinese Neolithic cultures dating to around 7000 BCE. Around 2000 BCE, the introduction of copper-bronze metallurgy brought many of the Neolithic settlements, especially those in the Yellow River basin, to the threshold of the Bronze Age. However, it was only around 1500 BCE that urban centres began to emerge with the expansion of agricultural productivity and advancements in metallurgy and craft production. These events led to the rise of the first Chinese Bronze Age territorial empire. The history of China is organised into various dynasties. The Shang dynasty (1600-1046 BCE) and the Zhou dynasty (1046-256 BCE) were two well-known dynasties of the Bronze Age. By 600 BCE, the use of iron became popular throughout China, and the Chinese Iron Age generally dates from this period onwards. The name “China” probably comes from the Iron Age Qin (Ch’in) dynasty (221-206 BCE), also known as the first imperial dynasty of China, which is credited with unifying the country. Another important Chinese dynasty of the Iron Age was the Han dynasty (206 BCE-220 CE).
(i) Why did the growth of agriculture contribute to the rise of urban centres in ancient China?
(ii) How did the use of bronze and iron help in the development of Chinese civilisation?
(iii) Explain any two factors that helped transform early Chinese settlements into a powerful civilisation.
Answer:
(i) The growth of agriculture produced surplus food, which supported a larger population and allowed people to engage in crafts, trade and administration, leading to the growth of urban centres.
(ii) Bronze and iron improved the quality of tools and weapons, increasing agricultural production, craft activities, defence and economic development.
(iii) The transformation of early Chinese settlements into a powerful civilisation was supported by

• Advances in agriculture and metallurgy, which increased food production and encouraged trade and urban development.
• Strict dynastic rule, which helped unify people, establish organised administration and maintain political stability.

Question 2.
Read the given source and answer the questions that follow.
In the Indian subcontinent, we find regional variation in the initiation of agricultural ways of life. In the northwest, the site of Mehrgarh on the Bolan River (in present-day Pakistan) is the oldest Neolithic site. It was also the earliest agricultural village, dating back to about 7000 BCE. Its people built handmade sun-dried brick houses and granaries, buried their dead in graves, and made a variety of ornaments from semi-precious stones such as lapis lazuli, carnelian, and shells. They cultivated wheat and barley and raised sheep, goats and Indian cattle—the zebu (humped bull) in particular. They were also the first to make copper objects, thus entering the Metal Age and becoming popularly known as the Chalcolithic people by about 4000 BCE. This laid the basis for the Bronze Age Sindhu-Sarasvati civilisation around 2600 BCE.
(i) Why did the people of Mehrgarh build granaries?
(ii) How did the use of copper influence the lives of the people of Mehrgarh?
(iii) Explain any two features of Mehrgarh that show it was a settled agricultural community.
Answer:
(i) Granaries were built to store surplus food safely for future use and to protect it from spoilage.
(ii) The use of copper helped people make stronger tools and marked the beginning of the Chalcolithic (Metal) Age, leading to technological progress.
(iii) Mehrgarh was a settled agricultural community because

• People built permanent sun-dried brick houses and granaries instead of living a nomadic life.
• They practised agriculture by growing wheat and barley and domesticated animals such as sheep, goats and cattle.

Early Humans and Beginning of Civilisation Class 9 Picture Based Questions

Question 1.
The given image shows a stepped temple built on a raised platform. Identify the structure shown in the picture.

Options:
(a) Pyramid
(b) Mastaba
(c) Ziggurat
(d) Citadel
Answer:
(c) Ziggurat

Question 2.
The given image shows wedge-shaped symbols impressed on a clay tablet. Identify the writing system shown in the picture.

Options:
(a) Hieroglyphic Script
(b) Cuneiform Script
(c) Harappan Script
(d) Brahmi Script
Answer:
(b) Cuneiform Script

Question 3.
The given image shows a long defensive wall built across hills and mountains. Identify the monument shown in the picture.

Options:
(a) Great Bath
(b) Great Wall of China
(c) Dockyard of Lothal
(d) Pyramid of Giza
Answer:
(a) Great Wall of China

Early Humans and Beginning of Civilisation Class 9 Map Based Questions

Question 1.
On the outline map of Asia, locate and label the following important archaeological sites.
(i) Mehrgarh
(ii) Harappa
(iii) Dholavira
(iv) Kalibangan
Answer:

Question 2.
On the outline map of Asia, locate and label the following important archaeological sites.
(i) Kot Diji
(ii) Amri
(iii) Lothal
(iv) Kunal
Answer:

Question 3.
On the outline map of the world, locate and label the following regions.
(i) Africa
(ii) Europe
(iii) Asia
(iv) Arabian Desert
(v) Sahara Desert
Answer:

Reviewing the Class 9 SST Extra Questions and Class 9 SST Chapter 3 Atmosphere and Climate Extra Questions and Answers before exams can boost your confidence.

Atmosphere and Climate Class 9 Extra Question Answer

Class 9 SST Chapter 3 Atmosphere and Climate Extra Questions

Atmosphere and Climate Class 9 Very Short Question Answer

Question 1.
“The ozone layer plays a vital role in the atmosphere of the Earth.” Explain the statement with any two points.
Answer:
The ozone layer plays a vital role in the atmosphere of the Earth in the following ways.

• It absorbs harmful ultraviolet (UV) radiation from the Sun, protecting humans, animals, and plants from damage.
• It helps maintain conditions suitable for life on Earth by preventing excessive solar radiation.

Question 2.
Why does the temperature decrease with height in the troposphere?
Answer:
In the troposphere, temperature decreases with height at a rate of 1°C per 165 metres because the layer is heated from the Earth’s surface. Air molecules higher up are farther from the heat source, making it cooler as altitude increases.

Question 3.
What is the significance of nitrogen in the atmosphere?
Answer:
Nitrogen makes up about 78% of the atmosphere. It dilutes oxygen to prevent rapid burning, is essential for protein formation in plants and animals, and plays a critical role in sustaining life on Earth.

Question 4.
“The outermost layer of the atmosphere plays an important role in supporting modern technology.” Explain the statement with suitable examples.
Answer:
The outermost layer of the atmosphere plays an important role in supporting modern technology is as follows.

• The exosphere provides space for artificial satellites to orbit the Earth, which are used for communication, weather forecasting, and navigation.
• It allows smooth transmission of signals, helping in television broadcasting, mobile networks, and GPS services worldwide.

Question 5.
What causes land and sea breezes?
Answer:
Land breezes occur at night when the land cools faster than the sea, causing air to blow from land to sea.
Sea breezes occur during the day when land heats faster than water, causing air to blow from the sea to land.

Question 6.
“Clouds form in the atmosphere and water falls to the Earth in different forms such as rain, snow, sleet and hail.” Define precipitation and mention any two forms of it.
Answer:
Precipitation is the falling of condensed water vapour from the atmosphere to the Earth. Two forms of precipitation are rain and snow.

Question 7.
Why is the thermosphere important for communication?
Answer:
The thermosphere is important for communication because it contains the ionosphere, which reflects radio waves to Earth, enabling long-distance radio communication. It also supports satellite signals and other space-based communication systems, ensuring reliable transmission of information.

Question 8.
Explain the main difference between weather and climate.
Answer:
The main differences climate are as follows between weather and climate are as follows.

Weather	Climate
Refers to atmospheric conditions at a specific time and place, like temperature, rainfall, or humidity.	Refers to the long-term average of weather conditions over a large area, usually measured over 30 years or more.
Changes frequently, even within a single day or week.	Remains relatively stable over long periods, showing seasonal or yearly patterns.

Question 9.
In hot areas, air becomes warm and rises, creating low pressure. In cold areas, air becomes heavy and sinks, creating high pressure. How does temperature affect atmospheric pressure?
Answer:
Temperature affects atmospheric pressure by changing the movement of air. In hot areas, the air becomes warm, expands, and rises, creating a low-pressure area. In cold areas, the air becomes cool, dense, and sinks, creating a high-pressure area. Air always moves from high-pressure areas to low-pressure areas, producing winds.

Atmosphere and Climate Class 9 Short Question Answer

Question 1.
“The different layers of the atmosphere together act as a protective shield for life on Earth.” Explain the statement with suitable points.
Answer:
The different layers of the atmosphere together act as a protective shield for life on Earth as follows.

• Troposphere: Provides water vapour and weather systems necessary for rainfall and climate regulation.
• Stratosphere: The ozone layer absorbs harmful ultraviolet (UV) radiation from the Sun.
• Mesosphere: Burns up meteors before they reach the Earth’s surface.
• Thermosphere: Reflects radio waves, enabling long-distance communication and satellite signals.
• Exosphere: Allows artificial satellites to orbit freely, supporting communication, GPS, and weather forecasting.

Question 2.
Describe the mechanism of the Indian South-West monsoon.
Answer:
The Indian South-West monsoon occurs due to differential heating of land and sea. During summer, the Indian landmass and Tibetan Plateau heat intensely, creating low pressure over North-West India, while the cooler Indian Ocean forms high pressure. Moist South-West winds blow from the ocean to land, bringing rainfall. The winds are lifted over mountains like the Western Ghats, causing orographic rainfall. By mid-July, the monsoon covers most of India. Its withdrawal begins in September as land cools and pressure patterns reverse. This monsoon is crucial for agriculture, water supply, and livelihoods.

Question 3.
How do local winds affect agriculture and human life in India?
Answer:
Local winds affect agriculture and human life in India in the following ways.
Effects on Agriculture:

• Sea breeze cools coastal areas, helping crops grow and supporting seasonal agricultural activities.
• Local winds aid in rainfall and moisture distribution, which is important for the ripening of fruits and irrigation.

Effects on Human Life:

• Hot and dry winds like the ‘loo’ can cause heatstroke and dehydration in humans.
• Local winds influence daily comfort and weather conditions, affecting health, outdoor work, and living conditions.

Question 4.
Ancient Indian scholars carefully observed natural events and celestial bodies to predict rainfall, helping farmers plan agricultural activities. Analyse the importance of traditional methods of rainfall prediction in India.
Answer:
The importance of traditional rainfall prediction methods can be analysed as follows.

• Ancient texts such as the Krishi-Parasara, Arthashastra, and Brihat Samhita describe different methods of predicting seasonal rainfall.
• These methods helped farmers decide the right time for sowing and harvesting crops, improving agricultural planning.
• Even today, many farmers continue to follow traditional knowledge along with modern weather forecasts for better farming decisions.

Question 5.
Explain the causes and consequences of climate change in India.
Answer:
The causes and consequences of climate change in India are as follows.
Causes:

• Burning of fossil fuels like coal, petrol, and natural gas releases large amounts of carbon dioxide into the atmosphere.
• Deforestation and industrial activities reduce the absorption of CO2 and release other greenhouse gases like methane and nitrous oxide.

Consequences:

• Rising temperatures and heatwaves affect human health, crops, and animals.
• Melting glaciers and unpredictable rainfall increase floods, droughts and other extreme weather events, threatening livelihoods and biodiversity.

Question 6.
“Effective flood management is essential to reduce damage and protect life in India.” Explain the statement with suitable measures.
Answer:
Effective flood management is essential to reduce damage and protect life in India. The measures to manage floods in India effectively are as follows.

• Rivers and flood-prone areas are mapped, construction is restricted, and early warnings are given to people.
• Embankments, levees, and reservoirs are built, and river channels are modified to control and divert excess water.
• Houses and settlements are built on raised platforms to keep people and property safe from floodwaters.

Question 7.
How does the carbon footprint affect global warming, and what steps can reduce it?
Answer:
The carbon footprint affects global warming and can be reduced in the following ways.
Effects on Global Warming:

• A high carbon footprint increases carbon dioxide and other greenhouse gases in the atmosphere, trapping heat and raising Earth’s temperature.
• It leads to climate change, causing extreme weather events like heatwaves, floods, droughts, and melting glaciers.

Steps to Reduce Carbon Footprint:

• Use public transport, walk, cycle, save electricity, and switch to renewable energy like solar or wind.
• Reduce, reuse, recycle materials, plant trees, and buy local products to lower emissions from production and transportation.

Question 8.
“The monsoon plays a key role in the Indian economy.” Explain the statement with examples.
Answer:
The monsoon plays a key role in the Indian economy in the following ways.

• About 60% of India’s agricultural land depends on monsoon rainfall, and kharif crops like rice, cotton, sugarcane and soybean need timely rain for good growth.
• Monsoon rains refill rivers, lakes and groundwater, providing water for irrigation, drinking and hydroelectric power, supporting agriculture and industries.
• Fishing, rural industries and seasonal work depend on monsoon patterns, and a weak or delayed monsoon can cause crop failure, economic loss and affect the national economy.

Atmosphere and Climate Class 9 Long Question Answer

Question 1.
“The troposphere and stratosphere are important for sustaining life on Earth.” Explain the statement with suitable points.
Answer:
The troposphere and stratosphere are essential for sustaining life on Earth in the following ways.
Importance of Troposphere:

• The troposphere contains almost all water vapour, which supports rainfall and provides freshwater for drinking, agriculture, and ecosystems.
• Weather phenomena like clouds, storms, and winds occur in the troposphere, helping regulate temperature and climate near the Earth’s surface.
• It contains most of the atmospheric mass, which maintains air pressure and allows humans, animals, and plants to survive.

Importance of Stratosphere:

• The stratosphere contains the ozone layer, which absorbs harmful ultraviolet (UV) rays and protects living organisms from skin, eye, and genetic damage.
• It helps maintain a stable climate by preventing excessive solar heating of the Earth’s surface.
• The stratosphere indirectly supports aviation and communication by influencing weather patterns below, ensuring life can exist safely on Earth.

Question 2.
“Every year, many regions in India face floods. Heavy monsoon rains, cyclones and overflowing rivers often submerge villages and farmland. At the same time, human activities like deforestation and unplanned urbanisation worsen the situation, affecting lives, property and agriculture.” Analyse the main causes and effects of floods in India.
Answer:
The causes and effects of floods in India can be analysed as follows.
Causes of Floods in India:

• Heavy and prolonged monsoon rains cause rivers to overflow, submerging agricultural land, towns and villages.
• Tropical cyclones along the Eastern coast push seawater inland, resulting in severe coastal flooding.
• Human activities like deforestation, unplanned urbanisation and building on floodplains reduce water absorption and weaken riverbanks, increasing flood risks.

Effects of Floods in India:

• Floods destroy houses, roads, bridges, crops and livestock, causing large economic losses for families and the government.
• They spread waterborne diseases like malaria, cholera and diarrhoea, affecting human health, especially in rural areas.
• Strong floodwaters cause soil erosion, reducing fertility, damaging farmland and disrupting ecosystems, harming plants, animals and fish populations.

Question 3.
Explain the concept of carbon footprint and its impact on global warming. Suggest ways to reduce it.
Answer:
A carbon footprint is the total amount of greenhouse gases, mainly carbon dioxide (CO₂), released into the atmosphere due to human activities. It includes direct emissions from activities like driving, cooking, and heating, and indirect emissions from the production and use of goods.

Impact on Global Warming:

• A high carbon footprint increases greenhouse gases in the atmosphere, trapping heat and raising global temperatures, which leads to climate change, heatwaves, and extreme weather events.
• It causes melting glaciers, rising sea levels, floods, droughts, and disruption of ecosystems, threatening human life, agriculture, and biodiversity.

Ways to Reduce Carbon Footprint:

• Use public transport, walk, cycle, save electricity, and switch to renewable energy sources like solar and wind to reduce emissions from daily activities.
• Reduce, reuse, and recycle materials, plant trees, and consume local and seasonal products to lower emissions from production, transportation, and waste.

Question 4.
“Climate change is increasing the frequency and intensity of natural disasters in India.” Explain with examples.
Answer:
Climate change is increasing the frequency and intensity of natural disasters in India, affecting people, agriculture and the environment in the following ways.

• Rising global temperatures are causing severe heatwaves across India, harming human health, animals, and crops.
• Melting glaciers and polar ice caps increase sea levels, leading to stronger coastal floods and cyclones in states like Odisha and Kerala.
• Changes in rainfall patterns cause some areas to face heavy floods while others suffer long droughts, affecting water availability.
• Frequent and intense storms, cyclones, and floods damage homes, roads, crops, and livelihoods, especially in rural and coastal regions.
• Ecosystems and wildlife are disrupted as natural disasters destroy habitats, reduce biodiversity, and threaten the survival of many species.

Question 5.
Two places, A and B, experienced different weather conditions. At place A, warm air was rising, and clouds were forming, while at place B, cool air was sinking and the sky remained clear. Analyse how atmospheric pressure created these different weather conditions.
Answer:
The different weather conditions at places A and B were caused by differences in atmospheric pressure.

• At place A, the air became warm due to higher temperatures. Warm air is lighter and rises upward, creating a low-pressure area. As the rising air reached higher altitudes, it cooled and the water vapour condensed to form clouds. This process often leads to cloudy skies and rainfall.
• At place B, the air was cool and dense, making it heavier than the surrounding air. It sank towards the Earth’s surface, creating a high-pressure area. As the sinking air moved downward, it became warmer and drier, preventing the formation of clouds.

Therefore, the sky remained clear and the weather stayed dry and sunny. Therefore, atmospheric pressure plays a major role in controlling weather conditions.

Atmosphere and Climate Class 9 Case Based Questions

Question 1.
Read the given source and answer the questions that follow.
One of the most urgent challenges that the Earth is facing today is climate change. It refers to long term changes in weather patterns such as temperature rainfall and wind caused mainly by human activities including the burning of fossil fuels deforestation and industrial pollution that releases gases like carbon dioxide into the atmosphere. These actions increase greenhouse gases such as carbon dioxide methane nitrous oxide water vapour in the atmosphere trapping heat and raising global temperatures. As a result we are witnessing more frequent floods droughts melting of glaciers rising sea levels and loss of biodiversity.

Climate change not only threatens ecosystems but also impacts human health agriculture and livelihoods. It also has great impact on almost all sections of the population including women and children. Tackling this issue requires collective efforts reducing carbon footprints using renewable energy protecting forests and adopting sustainable lifestyles. Every small step counts and every human being plays a vital role in shaping a healthier and greener future.

(i) Why does cutting down forests increase the effects of climate change?
Answer:
Cutting down forests increases climate change because fewer trees are available to absorb carbon dioxide from the atmosphere, leading to a higher concentration of greenhouse gases.

(ii) How does the increased concentration of greenhouse gases raise the Earth’s temperature?
Answer:
Greenhouse gases trap the heat radiated from the Earth’s surface and prevent it from escaping into space, causing the Earth’s average temperature to rise.

(iii) Explain any two ways in which climate change can affect agriculture and people’s livelihoods.
Answer:
Climate change affects agriculture and livelihoods in the following ways.

• Unpredictable rainfall, floods and droughts reduce crop production, causing economic losses for farmers and affecting food security.
• Extreme weather events damage homes, infrastructure and workplaces, disrupting employment and reducing the income of people who depend on climate-sensitive occupations.

Question 2.
Read the given source and answer the questions that follow.
The climate of India is strongly influenced by monsoon winds. The sailors who came to India during ancient times were among the first to notice the phenomenon of monsoon. They benefitted from the reversal of the wind system as they travelled by sailing ships at the mercy of the winds. The Arabs who had also come to India as traders named this seasonal reversal of the wind system monsoon derived from the Arabic word mausim which literally means season. Monsoon winds are seasonal winds. They can be categorised into the South-West and the North-East monsoon. The South-West monsoon also known as the summer monsoon is characterised by winds blowing from sea to land.

During summer the landmass of India heats up faster than the surrounding oceans. This creates a low pressure area over the Indian subcontinent while the Indian ocean remains relatively cooler and has high pressure. Winds move from high pressure areas to low pressure areas so moist winds blow from the ocean towards the land bringing rainfall. It accounts for most of the rainfall in the country throughout the year. The winter monsoon also known as the North-East monsoon occurs in India from October to February. During this season the Indian landmass cools faster than the surrounding oceans creating a high-pressure area over the land and low pressure over the seas.

(i) Why does the Indian landmass develop a low-pressure area during summer?
Answer:
The Indian landmass develops a low-pressure area duringsummer because land heats up much faster than the surrounding oceans, causing the warm air over the land to rise.

(ii) Why do the South-West monsoon winds bring heavy rainfall to India, while the North-East monsoon remains mostly dry?
Answer:
The South-West monsoon blows from the sea towards the land and carries large amounts of moisture, resulting in heavy rainfall. In contrast, the North-East monsoon blows from the land towards the sea and is generally dry, except after picking up moisture over the Bay of Bengal.

(iii) Explain any two reasons why the South-West monsoon is important for India’s economy.
Answer:
The South-West monsoon is importantfor India’s economy in the following ways.

• It provides water for agriculture, helping farmers grow crops and ensuring better food production.
• It fills rivers, reservoirs and groundwater, supporting irrigation, hydroelectric power generation, industries and domestic water supply.

Atmosphere and Climate Class 9 Picture Based Questions

Question 1.
The given image shows the different layers surrounding the Earth. Identify the layer where almost all weather phenomena occur.

Options:
(a) Stratosphere
(b) Mesosphere
(c) Troposphere
(d) Exosphere
Answer:
(c) Troposphere

Question 2.
The given image shows colourful lights in the sky near the polar regions. Identify the phenomenon shown.

Options:
(a) Rainbow
(b) Aurora
(c) Lightning
(d) Halo
Answer:
(b) Aurora

Atmosphere and Climate Class 9 Map Based Questions

Question 1.
On the outline map of India locate and label of the following with suitable symbols.
(i) The place where monsoon first strikes the Indian mainland.
(ii) The direction of Arabian Sea branch over Western Ghats.
(iii) The region receiving heavy rainfall from Bay of Bengal branch.
Answer:

Question 2.
On the outline map of India locate and label the following with suitable symbols.
(i) The Western Ghats
(ii) The Coromandel Coast
(iii) The Thar Desert region
Answer:

Reviewing the Class 9 SST Extra Questions and Class 9 SST Chapter 2 Shaping of the Earth’s Surface Extra Questions and Answers before exams can boost your confidence.

Shaping of the Earth’s Surface Class 9 Extra Question Answer

Class 9 SST Chapter 2 Shaping of the Earth’s Surface Extra Questions

Shaping of the Earth’s Surface Class 9 Very Short Question Answer

Question 1.
“The Earth’s interior is divided into distinct layers, each with unique properties.” Explain the statement by stating the composition of the core.
Answer:
The Earth’s interior is divided into distinct layers with unique properties. The core, being the innermost layer, is mainly composed of iron and nickel, making it the densest. Its outer part is liquid and generates the magnetic field, while the inner part remains solid due to extreme pressure.

Question 2.
Explain any two significances of the ‘asthenosphere’ in the theory of plate tectonics.
Answer:
The significance of the asthenosphere in the theory of plate tectonics is as follows.

• It provides a soft, partially molten surface that enables tectonic plates to move slowly over it.
• It facilitates plate movement driven by mantle convection currents, leading to geological processes like earthquakes and mountain formation.

Question 3.
“Agents of gradation are responsible for shaping the Earth’s surface.” Explain the statement by naming the five main agents of gradation.
Answer:
Agents of gradation shape the Earth’s surface through processes of erosion and deposition. The five main agents of gradation are

• Rivers
• Waves and Currents
• Wind
• Glaciers
• Underground Water

Question 4.
“The process of gradation involves both the wearing down and building up of the Earth’s surface.” Explain the statement with examples.
Answer:
The process of gradation involves both the wearing down and building up of the Earth’s surface in the following ways.

• Wearing down occurs through erosion, where agents like rivers, wind, and glaciers remove rock and soil from higher areas.
• Building up occurs through deposition, where these materials are deposited in lower areas, forming landforms like plains, deltas, and dunes.

Question 5.
What causes the formation of a waterfall in the upper course of a river?
Answer:
A waterfall forms in the upper course of a river when there is a sudden steep drop in the river bed, often due to differences in rock hardness. Softer rock erodes faster than harder rock, creating a vertical fall.

Question 6.
Why are beaches important for both nature and human life? Give any two reasons.
Answer:
Beaches are important for both nature and human life because

• They attract tourists for relaxation, swimming, and recreation, which supports the local tourism industry and economy.
• They provide fishing areas; many coastal communities depend on beaches for fishing and the collection of shells.

Question 7.
“Landforms have greatly influenced the development of human civilisations.” Explain the statement with examples.
Answer:
Landforms have greatly influenced the development of human civilisations in the following ways.

• Rivers and fertile plains, such as the Ganga, Nile, Brahmaputra, and Indus, supported agriculture and led to the growth of early cities.
• Mountains, such as the Himalayas, acted as natural barriers for protection and also allowed cultural exchange through passes like the Khyber Pass.

Question 8.
“Human activities in hilly areas can increase the risk of landslides.” Explain the statement with any two points.
Answer:
Human activities in hilly areas can increase the risk of landslides in the following ways.

• Deforestation removes vegetation cover that holds the soil together, weakening slope stability and making it prone to sliding.
• Construction and mining on hillsides disturb the natural structure of slopes, increasing the chances of soil and rock movement.

Shaping of the Earth’s Surface Class 9 Short Question Answer

Question 1.
“The theory of plate tectonics is a unifying theory that explains many geological phenomena.” Explain this statement by describing how plate tectonics leads to the formation of mountains and ocean trenches.
Answer:
The theory of plate tectonics explains the formation of mountains and ocean trenches in the following ways.
Formation of Mountains: At convergent boundaries, when two continental plates collide, the crust is forced to buckle and fold upward, forming fold mountains.
For example, the Himalayas were formed by the collision of the Indian and Eurasian plates.

Formation of Ocean Trenches: At convergent boundaries, when an oceanic plate subducts under a continental plate, it sinks into the mantle, forming deep ocean trenches.
For example, the Mariana Trench in the Pacific Ocean was formed by the subduction of the Pacific Plate.

Question 2.
How do the three types of plate boundaries (divergent, convergent, and transform) differ in their movement and the geological features they create?
Answer:
The three types of plate boundaries differ in the following ways.

Plate Boundary	Movement	Geological Features
Divergent Boundary	Plates move away from each other as magma rises due to mantle convection currents.	Magma rises through cracks, forming new crust and volcanic landforms.
Convergent Boundary	Plates move towards each other and collide.	Crust folds to form mountains; subduction creates deep ocean trenches.
Transform Boundary	Plates slide past each other horizontally.	Friction causes stress buildup and sudden release, resulting in earthquakes.

Question 3.
Explain how the process of chemical weathering differs from physical weathering, giving one example of each.
Answer:
Chemical weathering differs from physical weathering in the following ways.

Aspect	Physical Weathering	Chemical Weathering
Process	Breaks rocks into smaller pieces without changing their chemical composition through mechanical forces like pressure and temperature changes.	Changes the chemical composition of rocks by forming new minerals and weakening them through chemical reactions.
Conditions	Common in areas with large temperature variations and less moisture.	Occurs mainly in warm and humid climates where reactions are faster.
Example	Frost action breaks rocks as water freezes and expands in cracks.	Oxidation forms rust when minerals react with oxygen, altering rock composition.

Question 4.
“The course of a river is divided into three stages, each characterised by different landforms.” Describe the landforms found in the middle course of a river.
Answer:
The landforms found in the middle course of a river are as follows.

• Floodplain: Flat and fertile land formed when the river deposits fine soil (alluvium) during floods.
• Meanders: Broad, looping bends formed as the river flows from side to side.
• Ox-bow Lake: A crescent-shaped lake formed when a meander loop gets cut off from the main river channel.

Question 5.
Describe the role of wind as an agent of gradation. Name one erosional and one depositional landform created by it.
Answer:
Wind acts as an agent of gradation by eroding, transporting, and depositing sand and dust, especially in dry regions. Through these processes, it shapes landforms such as mushroom rocks, dunes, and loess.
Erosional and depositional landforms created by it are as follows.

• An erosional landform is a Mushroom Rock (or pedestal rock), formed when wind erodes the lower part of a rock more than the upper part.
• A depositional landform is Loess, which is fine dust particles deposited over large areas, forming fertile soil.

Question 6.
Why are glaciers called the ‘freshwater reservoirs’ of the Earth? Explain any three reasons.
Answer:
Glaciers are called the ‘freshwater reservoirs’ of the Earth because

• They store a large amount of the Earth’s freshwater in the form of ice, making them the largest natural source of freshwater.
• They feed rivers as they melt, providing a continuous supply of freshwater for drinking, irrigation, and hydroelectric power.
• They support ecosystems and human populations downstream, especially during dry seasons when river flow depends largely on melting glaciers.

Question 7.
How does a Glacial Lake Outburst Flood (GLOF) occur, and why is it a serious hazard in the Himalayan region?
Answer:
A Glacial Lake Outburst Flood (GLOF) occurs when a glacial lake suddenly releases water due to the breaking or overtopping of its natural ice or moraine dam. This can happen because of glacial melting, dam failure, ice avalanches, or earthquakes. Glacial Lake Outburst Flood is a serious hazard in the Himalayan region due to the following reasons.

• Rapid melting of glaciers due to climate change increases the size of glacial lakes and pressure on dams.
• Sudden flooding causes heavy loss of life and damage to infrastructure in downstream areas.

Shaping of the Earth’s Surface Class 9 Long Question Answer

Question 1.
A geography student visited two different regions. In Region A, people frequently experienced earthquakes and volcanic eruptions. In Region B, such events were extremely rare. Based on the observations, the student concluded that Region A was located near a tectonic plate boundary, while Region B was not. Analyse the geographical differences between the two regions that enabled the student to reach this conclusion.
Answer:
The student could conclude that Region A was located near a tectonic plate boundary due to the following geographical differences.
Occurrence of Earthquakes: Region A experiences frequent earthquakes because tectonic plates interact along plate boundaries, whereas Region B experiences very few earthquakes as it is located away from plate boundaries.

Volcanic Activity: Frequent volcanic eruptions in Region A indicate the presence of active plate movements that allow magma to reach the Earth’s surface. Region B shows little or no volcanic activity.

Plate Movement: Region A lies where tectonic plates converge, diverge, or slide past each other, resulting in intense geological activity. Region B is situated within the stable interior of a tectonic plate.

Formation of Landforms: Region A is more likely to have young fold mountains, volcanoes, and fault lines formed by plate movements, while Region B has comparatively stable and older landforms.

Geological Stability: Region A is geologically active and more prone to natural disasters such as earthquakes and volcanic eruptions. In contrast, Region B is relatively stable because it is located away from active plate boundaries.

Question 2
“The work of a river is a continuous process of erosion, transportation, and deposition, which changes its character as it flows from its source to its mouth.” Describe the features formed by a river in its upper, middle, and lower courses.
Answer:
The features formed by a river in its upper, middle, and lower courses are

• In the upper course, the river flows over a steep slope and mainly performs vertical erosion. It cuts deep valleys and forms features like waterfalls due to differences in rock hardness, showing strong erosional activity.
• In the middle course, the slope becomes gentler, and the river begins to widen. Both erosion and deposition occur, leading to the formation of floodplains, meanders, and ox-bow lakes as the river swings from side to side and deposits sediments along its banks.
• In the lower course, the river flows over a very gentle slope and deposition becomes dominant. It carries large amounts of sediment and deposits them near its mouth, forming extensive plains and delta regions, continuously reshaping the land.

Question 3.
“Underground water forms unique landforms through chemical weathering.” Explain the statement with suitable examples.
Answer:
Underground water forms unique landforms through chemical weathering because it dissolves soluble rocks such as limestone over a long period. Some common landforms formed by underground water are

• Caves are formed when underground water dissolves limestone. For example, the Ajanta and Ellora Caves in India are associated with underground weathering processes.
• Stalactites are icicle-shaped formations that hang from the roofs of caves. For example, the Borra Caves in Andhra Pradesh contain spectacular stalactites.
• Stalagmites are rock formations that grow upward from the floors of caves. For example, the Borra Caves also contain well-developed stalagmites.
• Sinkholes (dolines) are formed when the roof of an underground cavity collapses. For example, sinkholes are commonly found in limestone (karst) regions of the world.
• Underground rivers flow through cave systems created by the continuous action of underground water. For example, the Puerto Princesa Underground River in the Philippines flows through a limestone cave system.

Question 4.
Differentiate between beaches and coastal erosion landforms.
Answer:
The difference between beaches and coastal erosion landforms is as follows.

Beaches	Coastal Erosion Landforms
Beaches are formed by the deposition of sand, pebbles, and rocks by waves along the shore.	Coastal erosion landforms are formed by the erosional action of waves, tides and coastal currents.
Beaches support tourism, fishing, and recreation and protect nearby settlements from strong waves.	Coastal erosion landforms such as cliffs, wave-cut platforms, caves, arches, and stacks mainly reshape the coastline and attract tourists.
Beaches are found along the shore of a sea, ocean, or lake.	These landforms develop along eroding coastlines.
Beaches generally have a gentle and broad surface made of sand or pebbles.	Coastal erosion landforms often have steep, rocky features such as cliffs, caves, arches, and stacks.
Example: Marina Beach, Chennai.	Examples: Cliffs, wave-cut platforms, sea caves, arches, and stacks.

Question 5.
“Natural disasters linked to landforms are a recurring threat, but their impact can be significantly reduced through effective mitigation strategies.” Analyse this statement by describing the causes and mitigation strategies of the following: earthquakes, landslides or dust storms.
Answer:
The causes and mitigation strategies for earthquakes, landslides and dust storms are as follows.
Earthquakes: They can be caused by tectonic plate movement, where stress builds up along plate boundaries and is suddenly released, and by faulting along cracks in the Earth’s crust. Mitigation includes constructing earthquake-resistant buildings using strong and flexible materials on firm ground, and spreading awareness through safety practices like “Drop, Cover, Hold On” along with enforcing building codes.

Landslides: They can be caused by heavy rainfall that weakens soil and by steep slopes with loose or fractured rocks, along with human activities like deforestation. Mitigation includes building retaining walls and proper drainage systems, and adopting afforestation and hazard mapping to stabilise slopes and restrict construction.

Dust Storms: They can be caused by prolonged drought and strong winds over loose, dry soil, and by deforestation and overgrazing. Mitigation includes afforestation and shelter belts, along with sustainable land management practices like controlled grazing and soil conservation.

Shaping of the Earth’s Surface Class 9 Case Based Questions

Question 1.
Read the given source and answer the questions that follow.
Plate tectonics is an important theory, given by W.J. Morgan, in earth science, that explains the movement of the Earth’s crust. According to this theory, the outermost layer of the Earth is not one single piece but is broken into several large and small pieces called tectonic plates. These plates move slowly over the semi-molten layer beneath them and are responsible for major physical features and natural phenomena, such as mountains, earthquakes, and volcanoes. Tectonic plates are massive slabs of solid rock that move very slowly, usually a few centimetres per year. There are three main types of tectonic plates: continental plates, which carry continents; oceanic plates, which carry ocean floors; and mixed plates, which carry both continents and oceans. Some of the major tectonic plates of the world include the Pacific Plate, Eurasian Plate, African Plate, North American Plate, South American Plate, Indo-Australian Plate and Antarctic Plate. The movement of tectonic plates is caused by convection currents in the mantle. Heat from the Earth’s core causes molten material in the mantle to rise, while cooler material sinks. This continuous movement creates convection currents that push and pull the tectonic plates, causing them to move in different directions. The edges where tectonic plates meet are called plate boundaries.

(i) How are fold mountains formed?
Answer:
Fold mountains are formed when two continental plates collide, forcing the crust to buckle and fold upward, as in the Himalayas.

(ii) Why do most earthquakes occur along plate boundaries?
Answer:
Most earthquakes occur along plate boundaries because the movement of plates-colliding, sliding past, or pulling apart-releases stored energy in the form of seismic waves.

(iii) Explain in two ways how plate tectonics affects the Earth’s surface.
Answer:
Plate tectonics affects the Earth’s surface in the following ways.

• It creates landforms such as mountains, volcanoes, and ocean trenches through processes like collision, subduction, and volcanic activity.
• It explains the drift and distribution of continents, showing how they moved from the supercontinent Pangaea to their current positions.

Question 2.
Read the given source and answer the questions that follow.
Agents of gradation are natural forces that wear down, transport, and deposit materials on the Earth’s surface, helping to level or smooth it over time. The main agents of gradation are running water, glaciers, wind, waves and groundwater. Running water erodes rocks and soils to form valleys and plains. Glaciers scrape and carry huge amounts of material, carving U-shaped valleys. Wind shapes deserts by eroding and depositing sand. Sea waves erode coastlines to form cliffs, beaches and bays. Groundwater dissolves rocks, such as limestone, creating caves and sinkholes. Together, these agents are continuously modifying landforms, lowering high areas and filling up low areas. Rivers shape the land through the processes of erosion, transportation and deposition, creating a variety of landforms along their course. At the upper course, rivers often form V-shaped valleys, waterfalls, and rapids due to steep gradients and strong erosive forces. In the middle course, the river starts to meander, forming oxbow lakes and floodplains as it loses energy and begins depositing sediments. In the lower course, the river slows further and deposits large amounts of sediment, forming deltas, levees and alluvial fans. These landforms are not only important for understanding river dynamics but also play a vital role in agriculture, settlement and ecosystems.

(i) How do rivers act as agents of gradation?
Answer:
Rivers act as agents of gradation by eroding rocks in their upper course, transporting sediments in the middle course, and depositing materials in the lower course and delta regions.

(ii) Why is wind an important agent of gradation in dry regions?
Answer:
Wind is an important agent of gradation in dry regions because it can erode, transport, and deposit sand and dust where there is little vegetation.

(iii) Explain in two ways how glaciers and underground water shape the Earth’s surface.
Answer:
Glaciers and underground water shape the Earth’s surface in the following two ways.

• Glaciers erode valleys and mountains as they slowly move, and deposit rocks and debris, forming landforms like moraines and fjords.
• Underground water dissolves soluble rocks like limestone, creating features such as caves, sinkholes, and karst topography.

Shaping of the Earth’s Surface Class 9 Picture Based Questions

Question 1.
The given image shows rocks breaking down into smaller pieces due to natural forces. Identify the concept shown in the picture.

Options:
(a) Erosion
(b) Weathering
(c) Deposition
(d) Landslide
Answer:
(b) Weathering

Question 2.
The given image shows a large mass of snow rapidly sliding down a mountain slope. Identify the natural disaster shown in the picture.

Options:
(a) Landslide
(b) Avalanche
(c) Dust Storm
(d) Earthquake
Answer:
(b) Avalanche

Shaping of the Earth’s Surface Class 9 Map Based Questions

Question 1.
On the outline map of the world, locate and label the following with suitable symbols.
(i) African Plate
(ii) Eurasian Plate
(iii) Australian Plate
(iv) Pacific Plate
(v) North American Plate
(vi) South American Plate
(vii) Antarctic Plate
Answer:

Question 2.
On the outline map of the world, shade the Ring of Fire region.
Answer:

Detailed Understanding Society India and Beyond Class 9 Solutions and Class 9 Social Science SST Chapter 9 The Price Puzzle What Drives the Market Question Answer NCERT Solutions make it easier to complete textbook exercises.

Class 9 SST Chapter 9 The Price Puzzle What Drives the Market Question Answer

Class 9 The Price Puzzle What Drives the Market Question Answer

The Big Questions (Page No. 195)

Question 1.
What are the factors that influence the demand and supply of goods and services in a market?
Answer:
The demand for goods and services is influenced by factors such as the price of related goods, consumer income, tastes and preferences, seasonality, and future price expectations. Supply is influenced by the prices of related goods, the number of sellers, technology, and producers’ future expectations. These factors affect the quantity demanded and supplied even when the product’s own price remains unchanged.

Question 2.
How are the prices of goods and services determined through the demand and supply interactions?
Answer:
Prices are determined by the interaction of demand and supply in the market. When demand is greater than supply, prices tend to rise. When supply is greater than demand, prices tend to fall. The price adjusts until the quantity demanded equals the quantity supplied, creating market equilibrium where there is neither a shortage nor a surplus.

Question 3.
What is market equilibrium, and does it exist in the real world?
Answer:
Market equilibrium is the situation where the quantity demanded equals the quantity supplied at a particular price. However, it is not a fixed condition in the real world. Changes in demand, supply, consumer preferences, technology, government policies, weather, and other factors continuously shift the equilibrium, causing markets to adjust to a new equilibrium over time.

Question 4.
How and why does the government intervene in the market?
Answer:
The government intervenes by fixing price ceilings and price floors. It regulates monopolies and controls black marketing and hoarding. It also establishes regulatory authorities and increases the supply of essential goods when needed. The government intervenes to protect consumers and producers. It prevents unfair market practices and ensures fair prices. It also promotes social welfare and helps markets function efficiently.

The Price Puzzle What Drives the Market Question Answer Class 9

InText Questions

Question 1.
Create your own demand schedule for buying notebooks at different prices. At what price would you buy the most? At what price would you stop buying altogether? What could be the reason behind your choices? (Page 200)
Answer:
Individual Demand Schedule for Notebooks

Price per Notebook (₹)	Quantity Demanded (Notebooks)
100	1
80	2
60	3
40	5

I would buy the maximum number of notebooks at ₹ 40 because they are more affordable. I would stop buying notebooks if the price reached ₹ 100 or above, as it would exceed my budget. Lower prices encourage me to buy more, whereas very high prices reduce my willingness and ability to purchase.

Question 2.
Ask your family members if they postponed or preponed buying any product because of future expectations of changes in price. (Page 200)
Answer:
My family postponed buying a television because they expected festive discounts during Diwali. They believed the price would fall and attractive offers would be available. As a result, they waited for the sale and purchased the television at a lower price, saving money. This shows how expectations about future prices influence present buying decisions.

Question 3.
In the chapter ‘Democracy’, you have read that a democratic government is accountable to the people and is expected to act in their interest.

1. According to you, how should a democratic government decide when and how much it should intervene in markets to protect people’s welfare?
2. Whose voices should a democratic government consider while making such decisions—consumers, producers, workers, or others? Why?

Answer:

1. A democratic government should intervene when markets fail to function fairly or efficiently. The extent of intervention should depend on the seriousness of the problem. It should ensure fair prices, protect public welfare, and maintain a balance between consumer interests and economic growth.
2. A democratic government should consider the views of consumers, producers, workers, and other stakeholders. Each group is affected differently by market decisions. This helps ensure fair decisions, protect public welfare, and promote balanced economic development.

The Price Puzzle What Drives the Market Class 9 Questions and Answers

Questions and Activities (Page No. 210-213)

Question 1.
An increase in income always leads to a rise in demand for goods. Defend or refute, giving reasons for the same.
Answer:
The statement can be refuted. An increase in income does not always increase the demand for every good. While demand for many normal goods may rise, consumers may reduce their demand for certain goods if they shift to better-quality alternatives. Therefore, the effect of income on demand depends on the type of good and consumer preferences.

Question 2.
If petrol prices double, what happens to
(a) Demand for diesel cars
(b) Demand for electric cars
(c) Demand for car accessories
(d) Demand for public transport
Answer:
(a) Demand for diesel cars may increase because they become a relatively cheaper alternative to petrol cars.
(b) Demand for electric cars is likely to increase as consumers shift to vehicles with lower running costs.
(c) Demand for car accessories may decrease if fewer people buy new petrol cars or reduce their overall spending on vehicles.
(d) Demand for public transport is likely to increase because it becomes a more economical option than using private petrol vehicles.

Question 3.
A farmer traditionally irrigates fields manually (labour-intensive). He installs drip irrigation (a technology uPagerade) that reduces water use by 40% and increases yield by 30%. How does this affect-
(a) His cost of production
(b) His willingness to supply at different prices
(c) The overall market supply if many farmers adopt this technology
Answer:
(a) His cost of production decreases because water and labour are used more efficiently.
(b) He becomes willing to supply a larger quantity at different prices because production becomes more efficient and profitable.
(c) The overall market supply increases because higher production by many farmers raises the total quantity supplied in the market.

Question 4.
During online festival sales, the prices of many products are very low. Use the concept of demand and supply to explain why the sellers sell at such a low price. What happens to the equilibrium when the price is lowered? Does this benefit only consumers or sellers as well? Explain.
Answer:
During online festival sales, sellers reduce prices to attract more customers and increase the quantity sold. Lower prices encourage higher demand, helping sellers clear inventory and increase overall sales. When the price is reduced, the market adjusts towards a new equilibrium where a larger quantity of goods is sold. Consumers benefit by purchasing products at lower prices, while sellers also benefit through higher sales volume, better inventory management, and increased customer satisfaction.

Question 5.
Suppose the government sets a maximum sale price for an essential vaccine below the market-driven price. What is likely to happen? Choose from the options below and elucidate your point.
(a) Surplus
(b) Shortage
(c) No effect
(d) Fall in demand
Answer:
(b) Shortage
When the government fixes the maximum price below the market price, consumers demand more vaccines because they become affordable. However, producers may reduce supply due to lower profits. As a result, demand becomes greater than supply, leading to a shortage of vaccines.

Question 6.
The government levies higher taxes on products such as tobacco and alcohol to promote healthier choices among citizens. Can you find out other goods where price controls have been set in place? What are the reasons for the same?
Answer:
The government has also fixed prices for some essential medicines to make them affordable for everyone. It also regulates the prices of fertilisers to support farmers and encourage agricultural production. These price controls help protect consumers, improve access to essential goods, and promote public welfare.

Question 7.
Can excessive government regulation hurt markets? Explain with suitable examples.
Answer:
Yes, excessive government regulation can sometimes hurt markets. Strict price controls or unnecessary regulations may reduce producers’ profits and discourage production or investment. For example, if the price of an essential product is kept too low for a long time, producers may reduce supply, leading to shortages. Excessive regulations may also discourage businesses from adopting new technology or expanding production, reducing market efficiency.

Question 8.
In the table below, different prices of guava are given.

(a) Think and write how much guava you will buy at each price.
(b) Ask the same question to three of your friends and fill in the table.
(c) Also make a graph for each one of you and one final graph for the total quantity.
Answer:

Price	You	Friend 1	Friend 2	Friend 3	Total
₹ 100/kg	1 kg	1 kg	2 kg	1 kg	5 kg
₹ 80/kg	2 kg	2 kg	3 kg	2 kg	9 kg
₹ 50/kg	3 kg	4 kg	4 kg	3 kg	14 kg
₹ 20/kg	5 kg	5 kg	6 kg	5 kg	21 kg

The table shows that as the price of guava decreases, the quantity demanded by each consumer increases. The graph prepared from this data would show a downward-sloping demand curve, illustrating the Law of Demand.

Question 9.
Visit the nearby vegetable market and try to find answers to the following questions.
(a) Who decides the prices of different vegetables in the vegetable market?
(b) Sometimes the prices of a few vegetables are too high, and sometimes too low. Why is this?
(c) The price of tomatoes is high in the morning and eventually gets lower by the evening. Have you ever noticed this? Comment.
Answer:
(a) The prices of vegetables are mainly decided by the interaction of demand and supply in the market.
(b) Prices become high when demand is greater than supply and low when supply is greater than demand. Weather conditions, seasonal changes, transport costs, and the availability of vegetables also affect prices.
(c) Yes, this is commonly observed. Tomatoes are perishable goods, so sellers often reduce their prices by evening to sell the remaining stock and avoid losses due to spoilage.

Question 10.
Categorise the following combination of goods into substitute goods and complementary goods.
(i) Movie ticket in the cinema hall and popcorn
(ii) Eraser and pencil
(iii) Laptop and computer
(iv) Air Conditioner and cooler
(v) Notebook and pen
(vi) Apple and banana
(vii) Mobile and earphones
Answer:

Combination of Goods	Category
Movie ticket in the cinema hall and popcorn	Complementary Goods
Eraser and pencil	Complementary Goods
Laptop and computer	Substitute Goods
Air Conditioner and cooler	Substitute Goods
Notebook and pen	Complementary Goods
Apple and banana	Substitute Goods
Mobile and earphones	Complementary Goods

Question 11.
The figure below shows the demand curve DD’ and Supply curve SS’. Based on the figure, answer the following questions.

(a) What does point E represent in this market?
(b) What is the equilibrium price and equilibrium quantity at point E?
(c) Point A lies on DD’. Point B lies on SS’. What do the points A and B indicate about demand and supply? What does the gap between A and B (both on the upper dashed price line) represent?
(d) Point F lies on DD’. Point C lies on SS’. What do the points F and C indicate about demand and supply? What does the gap between C and F (both on the lower dashed price line) represent?
(e) If the price stays at the lower dashed line, what could happen next in a free market?
Answer:
(a) Point E represents market equilibrium, where the demand curve and supply curve intersect.
(b) The equilibrium price is ₹ 250, and the equilibrium quantity is 30 kg.
(c) Point A shows the quantity demanded at the higher price, and point B shows the quantity supplied at the same price. The gap between A and B represents excess supply or surplus, because supply is greater than demand.
(d) Point F shows the quantity demanded at the lower price, and point C shows the quantity supplied at the same price. The gap between C and F represents excess demand or shortage, because demand is greater than supply.
(e) If the price stays at the lower dashed line, demand will remain greater than supply. In a free market, this shortage may push the price upward until the market moves back towards equilibrium.

Question 12.
Draw a market equilibrium graph using the following demand schedule.

(a) Plot the demand and supply curve using the above data.
(b) Identify the equilibrium price and quantity.
(c) Observe the above data and analyse what happens if the price is set at ₹ 20 or ₹ 40.
Answer:
(a)

(b) The equilibrium price is ₹ 30, and the equilibrium quantity is 15 kg, where quantity demanded equals quantity supplied.
(c) At ₹ 20, the quantity demanded is 10 kg, while the quantity supplied is 20 kg. This creates a surplus of 10 kg because supply is greater than demand.
At ₹ 40, the quantity demanded is 20 kg, while the quantity supplied is 10 kg. This creates a shortage of 10 kg because demand is greater than supply.
In a free market, prices tend to adjust until equilibrium is restored.

Teachers recommend using Class 9 SST Notes and NCERT Class 9 SST Chapter 9 The Price Puzzle What Drives the Market Notes for quick revision before tests.

Class 9 The Price Puzzle What Drives the Market Notes

Class 9 SST Chapter 9 The Price Puzzle What Drives the Market Notes

Demand and Supply, Deviations

Every day, people buy and sell goods and services. The price of tomatoes can rise after heavy rain damages crops.

The price of umbrellas increases during the monsoon. A cinema ticket costs more on weekends than on weekdays.

These changes are not random. In most cases, .prices change because of the way buyers and sellers respond to market conditions.

Economics explains these changes using two simple ideas: demand and supply.
What is demand: Demand refers to the quantity of a commodity that a consumer is willing and able to buy at a particular price during a given period of time.

The law of demand states that, keeping all other factors constant (ceteris paribus), there is an inverse relationship between price and quantity demanded.

Law is based on following assumptions: There is no change in the price of related goods. There is no change in the income of consumers. Tastes and preferences remain constant. There are no expectations of price change in the future.

What is supply: Supply is the quantity of a commodity that a producer is willing and able to sell at a particular price during a given period of time.

The law of supply states that, keeping all other factors constant, (ceteris paribus), there is a direct relationship between price and quantity supplied.

Assumptions of the Law of Supply: There is no change in the price of related goods. There is no change in the prices of inputs. The state of technology remains constant. There is no change in the government policy. There are no changes in the goals of the firms.

Demand and supply are the fundamental forces that determine price in a market.
These laws explain the behaviour of consumers and producers in response to changes in price.

Class 9 SST Chapter 9 Notes – The Price Puzzle What Drives the Market Notes Class 9

Do these laws always hold true?
While the laws of demand and supply explain general market behaviour, they may not always apply in real- life situations. In certain cases, such as essential goods (like salt, life-saving medicines), perishable goods (like vegetables), or when people expect prices to rise or fall in the future, consumers and producers may not respond to price changes in the usual way.
These situations are known as deviations from the laws.

Law of Demand
The law of demand explains that, keeping other factors constant, an increase in the price of a good leads to a decrease in itfe quantity demanded. This inverse relationship is due to:

Substitution Effect: Consumers shift to relatively cheaper substitutes when the price of a good rises. For example, when the price for coffee increases, people may shift to tea leading to a rising demand for tea.

Income Effect: When prices rise, the actual purchasing power of consumers decreases. For example, if the price of milk increases, a family may buy less milk because their income cannot afford the usual quantity.

Diminishing Marginal Utility: As a consumer buys more units of a good, the additional satisfaction from each extra unit decreases. So consumers are less willing to pay a higher price for more units of the same good. For example, the first slice of pizza gives more satisfaction than the fourth, so consumers are not willing to pay the same price for additional units.

Consumer Behaviour: Consumers tend to maximise satisfaction by avoiding higher-priced goods. For example, when the price of branded shoes increases, consumers may delay the purchase or choose cheaper alternatives.

Demand Schedule: Inverse Relationship between Price and Quantity Demanded

Price of Good (₹)	Quantity Demanded (Units)	Relationship
10	100	As price rises ↑
20	80	Demand falls ↓
30	60
40	40
50	20

Demand Curve — What the Graph Shows
The graph shows the relationship between the price of a good and the quantity demanded. Price is shown on the vertical (Y) axis, while quantity demanded is shown on the horizontal (X) axis.

The demand curve slopes downward from left to right, indicating an inverse relationship between price and quantity demanded.

As the price rises from ₹10 to ₹50, the quantity demanded falls from 100 units to 20 units. This illustrates the Law of Demand, which states that, other things remaining constant, quantity demanded varies inversely with price.

A movement along the demand curve occurs due to a change in the price of the good, while a shift of the demand curve occurs due to changes in other factors such as income, tastes and preferences, or prices of related goods.

Individual Demand and Market Demand
Individual demand refers to the quantity of a good that a single consumer is willing and able to buy at various prices. Each consumer makes decisions based on their income, taste, and need.

Market demand is the total demand of all consumers for a good at a given price. It is obtained by adding up individual demands. Producers and policymakers focus mainly on market demand rather than individual demand.

Factors Affecting Demand

Factor	Effect on Demand
Income of consumers	Higher income → demand rises; lower income → demand falls
Tastes and preferences	If a product becomes fashionable, demand increases
Prices of related goods	If the price of a substitute rises, demand for the original good rises
Expectations about future prices	If prices are expected to rise, consumers buy more now
Size of population	Larger population → higher market demand

Shifts in Demand
Demand can change even when the price of the good stays the same. When this happens, the demand curve shifts.

If demand increases, the demand curve shifts to the right. At the same price, consumers want to buy more than before.

If demand decreases, the demand curve shifts to the left. At the same price, consumers want to buy less than before.
Common causes: change in income, change in tastes, change in prices of related goods, change in expectations, change in population size.

Law of Supply
The law of supply states that, other factors remaining constant, an increase in price leads to an increase in quantity supplied. This direct relationship exists because:

Profit Motive: Higher prices increase profit margins for producers. With rising prices, producers increase their production to attain higher profits.

Expansion of Production: With rising prices, firms are encouraged to increase output to earn higher revenue.

Entry of New Firms: Higher prices attract new producers into the market, which increases the supply in the market.

Supply Schedule: Direct Relationship between Price and Quantity Supplied

Price of Good (₹)	Quantity Supplied (Units)	Relationship
10	20	As price rises ↑
20	40	Supply rises ↓
30	60
40	80
50	100

Supply Curve — What the Graph Shows
The graph shows the relationship between the price of a good and the quantity supplied. Price is shown on the vertical (Y) axis, while quantity supplied is shown on the horizontal (X) axis.

The supply curve slopes upward from left to right, indicating a direct relationship between price and quantity supplied.

As the price rises from ₹10 to ₹50, the quantity supplied increases from 20 units to 100 units. This happens because higher prices encourage producers to supply more goods in the market.

A change in price causes movement along the supply curve. Changes in factors such as production costs, technology, or government policies can shift the entire supply curve.

Deviation from the Laws of Demand and Supply
Meaning of Deviation
In real life, demand and supply may not always follow the usual relationship with price. Such situations are called deviations from the laws of demand and supply.

Normally:

1. Demand decreases when price increases.
2. Supply increases when price increases.

However, in some cases, this may not happen.

Factors Causing Deviations
Deviations occur due to:

1. Nature of goods (necessities or luxury goods)
2. Urgency of need
3. Expectations about future prices
4.  Nature of the product (perishable goods)

1. Necessities
Necessities such as salt, food grains and life-saving medicines are goods people cannot do without. When their price rises, demand does not fall much, since consumption cannot easily be reduced.

2. Luxury / Status Goods
Status goods are luxury goods that people buy not only for their usefulness but also for the prestige and social status associated with owning them, such as designer handbags, luxury cars, or premium watches. In some cases, a rise in price makes these goods appear more exclusive and desirable, leading to an increase in demand. This phenomenon is known as the Veblen effect and is a recognised deviation from the law of demand.

3. Perishable Goods
Perishable goods such as fresh fish, milk, vegetables, and baked items spoil quickly. Sellers face time pressure to sell these goods. A seller may lower prices near the end of the day to avoid waste. This can cause unusual price behaviour — supply may increase even when prices fall, which is a deviation from the law of supply.

4. Expectations of Future Prices
If prices are expected to rise in the future, consumers may buy more even at higher prices, while producers may reduce current supply to sell later at higher prices.

Situation	What happens	Why
Necessities	Demand does not fall much	Essential needs
Luxury goods	Demand may in­crease with price	Status value
Perishable goods	Supply may in­crease even at low price	Avoid losses
Expectations	Demand/supply changes	Future price an­ticipation

Individual Supply and Market Supply
Individual supply refers to the quantity of a good that one producer is willing to sell at different prices. Each producer makes decisions based on costs, resources, and expected profit.

Market supply is the total supply of all producers in the market at a given price. It is obtained by adding individual

Factors Affecting Supply

Factor	Effect on Supply
Cost of production	Higher costs → supply falls; lower costs → supply rises
Technology	Better technology → production becomes efficient → supply rises
Number of producers	More producers → market supply rises
Expectations about future prices	If prices expected to rise, producers may hold back current supply
Natural conditions	Good weather → agricultural supply rises; drought → supply falls
Government policies	Taxes increase costs → supply falls; subsidies reduce costs → supply rises

Shifts in Supply
Supply can change even when the price of the good stays the same. When this happens, the supply curve shifts.

1. If supply increases, the supply curve shifts to the right. At the same price, producers supply more than before.
2. If supply decreases, the supply curve shifts to the left. At the same price, producers supply less than before.

Common causes: change in cost of production, change in technology, change in number of sellers, change in natural conditions, change in government policy, change in expectations about future prices.

Important distinction:

1. A change in quantity demanded/supplied happens when the price of the good changes — the consumer or producer moves along the same curve.
2. A change in demand/supply happens when something other than price changes — the entire curve shifts.

Enrichment Information
The concepts of demand and supply form the foundation of microeconomics. They are widely used to analyse market trends, price fluctuations, business strategies and government policies.

Quick Summary

Concept	Key Idea	Example
Law of Demand	Price ↑ → Demand ↓	Higher petrol prices reduce usage
Law of Supply	Price ↑ → Supply ↑	Farmers grow more when crop prices rise
Movement along Curve	Change due to price	Price fall → Demand increases
Shift of Curve	Change due to other factors	Income rise → Demand increases
Necessities	Demand does not fall much when price rises	Electricity, water
Luxury Goods	Demand may increase with price (status)	Branded products
Perishable Goods	Supply may not decrease even when price falls	Fruits, vegetables
Expectations	Future price expectations affect demand/ supply	Hoarding when prices expected to rise

Market Equilibrium and Market Outcomes

1. Market equilibrium occurs when quantity demanded equals quantity supplied.
2. Equilibrium price is the price at which demand and supply intersect.
3. When equilibrium is disturbed, it leads to a surplus or shortage.
4. Changes in demand or supply result in a shift in the equilibrium price and quantity.

Market Equilibrium
Market equilibrium is the situation in which the quantity demanded equals the quantity supplied at a particular price. At this point, there is no excess demand or excess supply; the market is in balance and there is no tendency for the price to change.

Market Schedule— Equilibrium, Surplus and Shortage

Price (₹)	Qty Demanded	Qty Supplied	Market Condition
10	100	20	Shortage (Demand > Supply)
20	80	40	Shortage
30	60	60	✓ EQUILIBRIUM
40	40	80	Surplus (Supply > Demand)
50	20	100	Surplus

Graph: How Surplus Appears on a Demand-Supply Diagram
The downward sloping curve represents demand.
The upward sloping curve represents supply.
The point where the demand and supply curves intersect is called equilibrium.

Here:
Price = ₹30
Quantity = 60 units
At this point, demand = supply
At prices above ₹ 30 say, ₹ 40
Quantity supplied (80 units) > Quantity demanded (40 units)
Producers supply more than consumers are willing to buy.
This creates a surplus (excess supply).

The gap between the supply and demand curves above the equilibrium price shows the surplus and represents unsold goods in the market.

Sellers are unable to sell all goods: To attract buyers, they reduce prices and the prices move back toward equilibrium.

Graph: How Shortage Appears on a Demand-Supply Diagram
The equilibrium price is ₹ 30 and equilibrium quantity is 60 units, where demand and supply intersect.
At price below ₹ 30, say ₹ 20,

Quantity supplied < Quantity demanded
Consumers want to buy more, but producers are willing to supply less.

This creates shortage as shown by the shaded region. As a result, there is an upward pressure on the prices and they tend to move back to the equilibrium.

Changes in Market Conditions
Increase in demand: Raises the equilibrium price and quantity.
Decrease in demand: Lowers the equilibrium price and quantity.
Increase in supply: Lowers price but increases quantity.
Decrease in supply: Raises price but reduces quantity.

Memory Box: Equilibrium, Surplus and Shortage

Situation	Demand vs Supply	Result	Price Movement
Equilibrium	Demand = Supply	Balanced Market	No change
Surplus	Supply > Demand	Excess goods	Price ↓
Shortage	Demand > Supply	Excess demand	Price ↑

Quick Rule: Above equilibrium → Surplus → Price falls | Below equilibrium → Shortage → Price rises

Effect of Changes in Demand and Supply on Equilibrium

Change	Effect on Equilibrium Price	Effect on Equilibrium Quantity
Demand increases	Rises	Rises
Demand decreases	Falls	Falls
Supply increases	Falls	Rises
Supply decreases	Rises	Falls

Enrichment Information
Market equilibrium plays a crucial role in determining prices in real-world markets. It helps businesses plan production, guides consumers in decision-making, and assists governments in understanding market behaviour.

Role of Government in the Economy

Sometimes, markets alone cannot achieve desirable outcomes for society. In such situations, the government intervenes to protect consumers, promote social welfare and improve market efficiency.

1. Price ceilings are maximum prices fixed by the government to protect consumers.
2. Price ceilings often lead to shortages and black markets.
3. Public goods are non-excludable and non-rival in nature.

Price Ceilings
A price ceiling is the maximum price fixed by the government, usually below the equilibrium price, to make essential goods affordable.The government imposes a price ceiling when the equilibrium price is too high and out of reach for many people.The government uses this option for essential commodities, such as food and medicines.

Price Ceiling: Market Schedule Example (Equilibrium Price = ₹ 30, Ceiling at ₹ 20)

Market Situation	Price	Qty Demanded	Qty Supplied	Outcome
Free Market Equili­brium	₹ 30	60 units	60 units	Balanced — no surplus or shortage
After Price Ceiling Set	₹ 20	80 units	40 units	Shortage of 40 units → Black market risk

Graph: How Price Ceiling Creates Shortage.
The graph shows the effect of a price ceiling on a market.

Equilibrium
The demand curve (D) slopes downward and the supply curve (S) slopes upward.
They intersect at point E, which is the equilibrium point where:
Price = ₹ 30
Quantity = 60 units

Price Ceiling
The government fixes the price at₹ 20, which is below equilibrium price.
This is shown by a horizontal line at ₹ 20.
Effect on Demand and Supply
At ₹ 20:
Quantity Demanded increases to 80 units as more people want to buy at lower price.
Quantity Supplied decreases to 40 units as producers supply less due to lower profit.

Shortage
Since demand (80) > supply (40), a shortage of 40 units arises which is shown by the shaded area between 40 and 80 units.
This shortage leads to risk of Black Market.

Shortages and Black Markets
When prices are fixed below equilibrium, the demand increases while the supply decreases. This creates a shortage, as the quantity demanded exceeds the quantity supplied. As a result, black markets may emerge, where goods are sold illegally at higher prices.

Market Failures
Market failure occurs when the free market fails to allocate resources efficiently, resulting in overproduction or underproduction of goods and a loss of overall social welfare.

Causes include:
Externalities: Effects of production/consumption on third parties who are not directly involved. For example, pollution from nearby factories harms the residents.

Negative externalities cause harm to others not involved in a transaction. Example: A factory discharges waste into a river, harming fishermen and residents downstream. Since the factory does not bear this cost, it produces too much — leading to overproduction relative to the socially desirable level.

Positive externalities provide benefits to others not involved in a transaction. Example: When a person gets vaccinated, nearby people also benefit because the disease is less likely to spread. However, since these wider benefits are not reflected in private decisions, the market may provide too little vaccination — leading to underproduction relative to the socially desirable level. In both cases, the market outcome differs from what is best for society because the price signal is incomplete. This justifies government intervention through taxes (for negative externalities) and subsidies (for positive externalities).

Information asymmetry: A situation where one party has ‘more information than the other, leading to an unfair or inefficient decision.

Public goods: Public goods are those goods that are available for use by everyone. These goods are non-excludable and non-rival. They are not efficiently provided by markets.

Public Goods
Non-excludable: People cannot be prevented from using them.
Non-rival: One person’s use does not reduce availability for others.
Examples: street lighting, national defence, public parks.

Memory Box: Price Control & Market Failure

Concept	Key Idea	Result
Price Ceiling	Price fixed below equilibrium	Shortage
Shortage	Demand > Supply	Price pressure ↑
Black Market	Illegal selling	Higher prices
Public Goods	Non-excludable & non-rival	Government provision

Price Floor
A price floor is the minimum price set by the government for a good or service. Sellers are not allowed to sell below this price. It is usually introduced to protect producers or workers from very low market prices.

Purpose of Price Floors

1. To protect farmers and producers from falling market prices that may not cover their costs of production.
2. To ensure workers receive a minimum wage that allows them to maintain a basic standard of living.

Examples of Price Floors:
Minimum Support Price (MSP): The government fixes a minimum price for crops such as wheat, rice, and sugarcane to protect farmers from falling market prices. Even if the market price falls, the government guarantees to buy crops at the MSP.

Minimum Wage: The government sets the lowest wage that employers must pay workers, ensuring they are not exploited with very low pay.

Effects of a Price Floor
When a price floor is set above the equilibrium price, it leads to:

Excess supply (surplus): Producers supply more than consumers are willing to buy at the higher price.

Unsold stock: Goods may remain unsold because demand is lower at the higher price.

Government intervention: The government may need to purchase the excess supply, as it does under the MSP scheme for agricultural goods.

Just like price ceilings create shortages, price floors create surpluses, because prices are kept higher than the market equilibrium level.

Why Markets Fail
Markets may fail due to several reasons:
Inequality in income and access: Some people may not be able to afford basic goods, even if the market is functioning efficiently. This leads to unequal outcomes in healthcare, education, and housing.

Lack of information: Consumers or producers may not have complete or accurate information about products, risks, or consequences. For example, people may unknowingly buy harmful products, or firms may ignore environmental damage. This is called information asymmetry.

Focus on profit over social welfare: Markets focus mainly on profit, not on social concerns. Issues like pollution, deforestation, and public health may be ignored because firms find it costly to address them. These are called externalities.

Certain essential goods are not profitable: Some essential gpods are not supplied by private firms because they capnot charge users or earn profit from them. These are called public goods.

Role of Government in Correcting Market Failure
The government may intervene in various ways to correct market failures:
(i) Taxes: Impose taxes on harmful activities such as pollution and tobacco use to reduce negative externalities and make producers bear the true social cost.

(ii) Subsidies: Encourage beneficial activities such as education and healthcare where positive externalities exist but the market underproduces.

(iii) Regulation: Enforce laws and safety standards to ensure fair practices and prevent harmful production.

(iv) Public provision: Directly provide essential goods and services like roads, defence, and street lighting that private firms will not supply.

(v) Information rules: Ensure consumers receive accurate information through labelling laws, safety standards, and consumer protection regulations.

Government intervention does not eliminate markets: it complements them by making them more efficient, fair, and socially responsible.

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Class 9 SST Chapter 8 Building Blocks in Economics The Problem of Choice Question Answer

Class 9 Building Blocks in Economics The Problem of Choice Question Answer

The Big Questions (Page No. 183)

Question 1.
What does economics deal with?
Answer:
Economics deals with the study of how individuals, businesses, and governments use limited resources to satisfy unlimited wants. It helps in making choices about the production, distribution, and consumption of goods and services.

Question 2.
What are the key questions in economics?
Answer:
The key questions in economics are

• What to produce?
• How to produce?
• For whom to produce?

Question 3.
How do different economic systems address these questions?
Answer:
Different economic systems address these questions in different ways:

• In a market economy, decisions are made by buyers and sellers through market forces.
• In a planned economy, the government makes these decisions.
• In a mixed economy, both the government and the private sector work together to answer these questions.

Building Blocks in Economics The Problem of Choice Question Answer Class 9

InText Questions

Question 1.
List three things your parents bought this month. Can you classify them into needs or wants? (Page No. 184)
Answer:
The following table classifies three items purchased this month into needs and wants.

Item Purchase	Need/Want
Groceries	Need
School notebooks	Need
New headphones	Want

Question 2.
Do you think having too many wants may create problems? Why or why not? (Page No. 184)
Answer:
Yes, having too many wants may create problems because resources such as money, time, and natural resources are limited. Trying to satisfy every want can lead to unnecessary spending, waste of resources, and environmental problems.

Question 3.
Ask your parents about how they make choices for everyday purchases. What is the opportunity cost of making a particular decision? (Page No. 186)
Answer:
My parents compare prices, quality, and usefulness before buying a product. They give priority to essential items and stay within their budget. The opportunity cost of a decision is the next best alternative that is given up. For example, if they buy a new school bag instead of a pair of shoes, the shoes become the opportunity cost of that decision.

Question 4.
How do you decide to spend your time? Is time a scarce resource? (Page No. 186)
Answer:
I decide how to spend my time by giving priority to important activities such as studying, completing homework, and helping at home before spending time on entertainment.
Yes, time is a scarce resource because it is limited and cannot be increased or recovered once it is lost.

Question 5.
Should the government allocate more funds to healthcare and education or defence and space exploration? Why or why not? (Page No. 189)
Answer:
The government should maintain a balance in spending. However, greater priority should be given to healthcare and education because they improve people’s quality of life, develop human resources, and support long-term economic growth. At the same time, adequate funds should also be allocated to defence and space exploration to ensure national security and promote scientific and technological progress.

Question 6.
In your opinion, should the government completely stay out of enterprise decisions? (Page No. 191)
Answer:
No. The government should regulate businesses to protect the public interest, but enterprises should have the freedom to make their own business decisions. A balance between regulation and freedom is the best approach.

Question 7.
Can you think of an example where government action helped or harmed an industry or sector? (Page No. 191)
Answer:
Yes. The government’s Digital India initiative helped the IT and digital services sector by improving internet access, promoting digital payments, and creating new business opportunities.

Building Blocks in Economics The Problem of Choice Class 9 Questions and Answers

Questions and Activities (Page No. 193-194)

Question 1.
Why do you think people’s wants keep changing over time? How does this affect production in an economy? Why cannot all our wants be satisfied?
Answer:
People’s wants keep changing over time because of changes in lifestyle, technology, income, and preferences. This affects production in an economy as producers continuously adjust the type and quantity of goods and services to meet changing consumer demand. All our wants cannot be satisfied because resources such as land, labour and capital are limited, whereas human wants are unlimited. Therefore, choices have to be made regarding the use of available resources.

Question 2.
‘Human wants are unlimited and keep changing’. How do you think this constant desire for more creates pressure on the environment? Can the fulfilment of wants and the extraction of resources be balanced?
Answer:
Human wants create pressure on the environment because increasing demand for goods and services leads to greater use of natural resources, causing pollution, deforestation, and resource depletion. The fulfilment of wants and resource use can be balanced through sustainable production, efficient use of resources, recycling and the adoption of environment-friendly technologies. These measures help meet present needs without harming the ability of future generations to meet their own needs.

Question 3.
Can you think of a resource in your region that is scarce but used wastefully? How could it be managed better?
Answer:
A resource that is scarce but often used wastefully in many regions is water. It is wasted through leaking pipelines, excessive use, and poor water management. This resource can be managed better through rainwater harvesting, repairing leaks, adopting water-saving methods, and creating public awareness about water conservation. These measures help ensure the efficient use of available water resources.

Question 4.
Which economic system—market, planned, or mixed—do you think gives people the most freedom? Which economic system is best suited for promoting innovation? Why?
Answer:
A market economy gives people the most economic freedom because individuals and private enterprises are free to make their own economic decisions without much government intervention. A market economy best promotes innovation because competition encourages enterprises to improve quality, reduce costs, and introduce new products and technologies to attract consumers.

Question 5.
Critically examine why pure economic systems rarely exist in reality. Assess the limitations of such systems and justify why a mixed economy is often considered a more practical and effective approach in real-world contexts.
Answer:
Pure economic systems rarely exist in reality because no single system can meet all the economic needs of a country. The limitations of pure market and planned economies are that a market economy may lead to inequality and inadequate public welfare, whereas a planned economy may restrict private enterprise, competition, and innovation. A mixed economy is considered a more practical and effective approach because it combines the advantages of both systems. It encourages private enterprise and competition while allowing the government to regulate the economy, provide public goods, and promote social welfare.

Question 6.
A student has ₹ 100 and must choose between buying a notebook or saving the money for buying a tennis racket later. Which economic concept best explains this situation?
(a) Demand
(b) Opportunity cost
(c) Production
(d) Inflation
Answer:
(b) Opportunity cost

Question 7.
How does understanding opportunity cost improve the quality of economic decision-making?
Answer:
Understanding opportunity cost improves the quality of economic decision-making by helping individuals, businesses, and governments compare available alternatives before making a choice. It encourages the efficient use of limited resources and ensures that the option providing the maximum overall benefit is selected.

Question 8.
Can effective economic decisions be made without reliable data? Support your answer with an example.
Answer:
No, effective economic decisions cannot be made without reliable data. Economic data helps governments and businesses understand current conditions and make informed decisions. For example, employment and income data help the government design welfare programmes, allocate resources efficiently, and address the needs of different sections of society.

Question 9.
Analyse how a country’s present economic choices can shape its long-term future. Why is it important to consider future consequences while making economic decisions today?
Answer:
A country’s present economic choices shape its long-term future by influencing economic growth, employment, and living standards. Therefore, it is important to consider future consequences while making economic decisions today so that resources are used efficiently, sustainable development is promoted, and the needs of future generations are also protected.

Question 10.
Identify a news article from any newspaper of your choice about a product or commodity (such as vegetables, fruits, fuel, or electronics) where producers or companies are deciding how much to produce or supply. Write 2-3 sentences explaining the example you found and why the production decision was made.
Answer:
A recent news report may show farmers increasing tomato production due to rising market prices and higher consumer demand. The production decision is made after analysing expected demand, prices, and production costs. This helps producers use resources efficiently, maximise profits, and reduce the risk of losses.

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Class 7 Maths Connecting the Dots Solutions

Class 7 Ganita Prakash Part 2 Chapter 5 Solutions Connecting the Dots

Figure it Out (Page : 101)

Question 1.
Shreyas is playing with a bat and a ball – but not cricket. He counts the number of times he can bounce the ball on the bat before it falls to the ground. The data for 8 attempts is 6, 2, 9, 5, 4,
6, 3, 5. Calculate the average number of bounces of the ball that Shreyas is able to make with his bat.

Solution:
Number of attempts = 8
Number of bounces of the ball
= 6,2,9,5,4,6,3,5
Sum :
∑ x i = 6 + 2 + 9 + 5 + 4 + 6 + 3 + 5 = 40

To calculate Average Mean :

The average number of bounces the ball that Shreyas is able to make with his bat is 5.

Question 2.
Try the activity above on your own. Collect data for 7 or more attempts and find the average.
Solution:
The data for 7 attempts is 3, 5, 4, 7, 6, 4, 5
Sum (∑ x i) = 3 + 5 + 4 + 7 + 6 + 4 + 5 = 34
Number of attempts (N) = 7

Average number of bounces = 4.86 approx.

Question 3.
Identify a flowering plant in your neighbourhood. Track the number of flowers that bloom every day over a week during its flowering season. What is the average number of flowers that bloomed per day?
Solution:
Number of new flowers that bloomed daily over a week (7 days) are as: (2, 3, 1, 4, 2, 3, 2)
Sum (∑ x i) = 2 + 3 + 1 + 4 + 2 + 3 + 2 = 17
Number of days (N) = 7

Average number of flowers that bloomed per day = 2.43 approximately.

Question 4.
Two friends are training to run a 100 m race. Their running times over the past week are given in seconds – Nikhil: 17, 18, 17, 16, 19, 17, 18; Sunil: 20, 18, 18, 17, 16, 16, 17. Who on average ran quicker?
Solution:
Average running times

Both Nikhil and Sunil have the same average running time, so both ran equally fast.

Question 5.
The enrolment in a school during six consecutive years was as follows: 1555, 1670, 1750, 2013, 2040, 2126. Find the mean enrolment in the school during this period.
Solution:
The total sum (∑ xi) of enrolments =
∑xi = 1555 + 1670 + 1750 + 2013 + 2040 + 2126 = 11154
Number of years = 6
Mean enrolment

Mean enrolment in the school during this period was 1859 students.

Figure it Out (Page: 112-113)

Question 1.
Find the median of onion prices in Yahapur and Wahapur.
Solution:

To find the median, the data for each town must be arranged in ascending order.
Yahapur prices (sorted) :
[(24,25,26,26,30,35,39,43,44,49,56,59)
Wahapur prices (sorted) :
[(16,17,18,19,23,30,35,38,39,42,52,60)
Yahapur median : 6th and 7th value are 35 and 39
Median = \(\frac{(35 + 39)}{2}\) = \(\frac{74}{2}\) = 37
Wahapur median : 6th and 7th value are 38 and 39
Median = \(\frac{ 38+39}{2}\) = \(\frac{ 77}{2}\) = 38.5
Median onion price in Yahapur is ₹37/kg Median onion price in Wahapur is ₹38.5/kg

Question 2.
Sanskruti asked her class how many domestic animals and pets each had at home. Some of the students were absent. The data values are 0,1,0,4,8, 0, 0, 2, 1, 1, 5, 3, 4, 0, 0, —, 10, 25, 2, —, 2, 4. Find the mean and median. How would you describe this data?
Solution:
The mean is calculated by summing all the data points and dividing by the total number of students surveyed (20).
Sum of data points :
∑xi = 0 + 1 + 0 + 4 + 8 + 0 + 0 + 2 + 1 + 1 + 5 + 3 + 4 + 0 + 0 + 10 + 25 + 2 + 2 + 4 = 72
Mean calculation :
Mean = Sum Number of students = 72/20 = 3.6.
The mean number of pets is 3.6.

Median
The median is the middle value of the data set when arranged in order. We first sort the 20 data points from least to greatest:
{0,0,0,0,0,0,1,1,1,2,2,2,3,4,4,4,5,8,10,25}
Since there are an even number of data points (20), the median is the average of the two middle values (the 10th and 11th values in the sorted list).
10th value: 2
11th value: 2
Median calculation :
Median = 2 + 2 / 2 = 2
The median number of pets is 2.

Question 3.
Rintu takes care of a date-palm tree farm in Habra. The heights of the trees (in feet) in his farm are given as: 50, 45, 43, 52, 61, 63, 46, 55, 60, 55, 59, 56, 56, 49, 54, 65, 66, 51, 44, 58, 60, 54, 52, 57, 61,62,60,60,67. Fill the dot plot, and mark the mean and median. How would you describe the heights of these palm trees? Can you think of quicker ways to find the mean? How many trees are shorter than the average height?

Solution:
The dot plot of height of trees.

Sum of heights of all trees = 50 + 45 + 43 + 52 + 61 + 63 + 46 + 55 + 60 + 55 + 59 + 56 + 56 + 49 + 54 + 65 + 66 + 51 + 44 + 58 + 60 + 54 + 52 + 57 + 61 + 62 + 60 + 60 + 67 = 1621
Number of trees = 29

= \(\frac{ 1621}{29}\) = 55.89 ft
Arranging heights in ascending order = 43, 44,45,46,49,50,51,52,52,54,54,55,55, 56, 56, 57, 58, 59, 60, 60, 60, 60, 61, 61, 62, 63, 65, 66, 67.
Since there are odd number of values (29), the median is the middle value.
Therefore, Median = 56.
The heights of the date palm trees range from 43 to 67 feet, with most between 55 and 60 feet.
Thirteen trees are shorter than the mean height.

Question 4.
The daily water usage from a tap was measured. The usage in liters for the first few days are: 5.6, 8, 3.09, 12.9, 6.5, 12.1, 11.3, 20.5, 7.4.
(a) Can the mean or median daily usage lie between 25 and 30? Justify your claim using the meaning of mean and median.
(b) Can the mean or median be lesser than the minimum value or greater than the maximum value in a data?
Solution:
(a) The mean or median cannot lie between 25 and 30. Because the mean is the average of all values, it is always between the minimum and maximum values, which are 3.09 litres and 20.5 litres, respectively. The median is the middle value, so it is also within the range of the data.
(b) No, the mean and median cannot be less than the minimum value or greater than the maximum value in a data set.

Question 5.
The weights of a few newborn babies are given in kgs. Fill the dot plot provided below. Analyse and compare this data.

Solution:

The weight of boys is between 2.6 kg and 4.1 kg. The weight of girls lies between 2.5 kg and 4 kg. The heaviest baby is a boy, and the lightest is a girl.

Question 6.
The dot plots of heights of another section of Grade 5 students of the same school are shown below. Can you share your observations? What can we infer from the dot plots and the central tendency measures?

Solution:
Observations and Inferences:
(a) The girls’ heights are more widely spread, ranging from 126 cm to 158 cm, while the boys’ heights range from 130 cm to 148 cm.
(b) Both the shortest and the tallest students in the class are girls.
(c) The girls’ mean height is less than both the class average and the boys’ mean height, indicating that boys are taller than girls on average in this class.
(d) For boys, the mean is slightly less than the median (142.05 < 143), showing a small influence of lower values.
(e) For girls, the mean is slightly greater than the median (140.14 > 140), showing a small influence of higher values.

Question 7.
The weights of some sumo wrestlers and ballet dancers are: Sumo wrestlers: 295.2 kg, 250.7 kg, 234.1 kg, 221.0 kg, 200.9 kg. Ballet dancers: 40.3 kg, 37.6 kg, 38.8 kg, 45.5 kg, 44.1 kg, 48.2 kg.
Approximately how many times heavier is a sumo wrestler compared to a ballet dancer?

Solution:
Sumo wrestlers
Sum of weights = 295.2 + 250.7 + 234.1 + 221.0 + 200.9 = 1201.9 kg
Average weight = 1201.9 ÷ 5 ≈ 240.38 kg
Ballet dancers
Sum of weights = 40.3 + 37.6 + 38.8 + 45.5 + 44.1 + 48.2 = 254.5 kg
Average weights = 254.5 ÷ 6 ≈ 42.4 kg
Compare the average weights

A sumo wrestler is approximately 6 times heavier than a ballet dancer.

Figure it Out (Page: 122-125)

Question 1.
The following infographic shows the speeds of a few animals in air, on land, and in water. Can we call this graph a bar graph?
(a) What is the scale used in this graph?
(b) What did you find interesting in this infographic? What do you want to explore further?
(c) Identify a pair of creatures where one’s speed is about twice that of the other.
(d) Can we say that a sailfish is about 4 times faster than a humpback whale? Can we say that a sailfish is the fastest aquatic animal in the world?

Solution:
(a) The scale used is 1 unit = 16 km/hr.
(b) The peregrine falcon is the fastest animal shown in the given infographic. Overall, animals are fastest in air, slower on land, and slowest in water.
(c) The cheetah (103 km/hr) is about twice as fast as the flying fish (56 km/hr).
(d) Yes, the sailfish is about 4 times faster than the humpback whale because the speed of the sailfish is 109 km / hr, and that of the humpback whale is 26 km / hr (since 26 × 4 = 104, which is close to 109).
However, we cannot say that the sailfish is the fastest aquatic animal in the world; it is only the fastest among the animals shown in the infographic.

Question 2.
Preyashi asked her students ‘If you were to get a super power to become aquatic (water-borne), aerial (airborne), or spaceborne which one would you choose?”. The responses are shown below. Some chose none. Draw a double-bar graph comparing how both grades chose each option. Choose an appropriate scale.

Solution:
First, organize the raw data by counting the frequency of each choice for both grades. The counts are as follows :

Question 3.
The temperature variation over two days in different months in Jodhpur, Rajasthan, is given below. Draw a double-bar graph. Use the scale 1 unit = 4° C. Can you guess which two months these days might belong to?

Solution:

These days might belong to December and May.

Question 4.
The following clustered-bar graph shows the number of electric vehicles registered in some states every year from 2022 to 2024.

(a) The data (rounded-off to thousands) for the states of Gujarat and Delhi are given in the table below. Mark the corresponding bars on the bar graph. (It is enough if you place the top of the bars between the two appropriate vertical guidelines.)

(b) Notice how the graph is organised, what scale is used, and what patterns the data shows.
(c) How would you describe the character various states between 2022 and 2024
(d) Approximately how many more registrations did Assam get in 2023 compared to 2022?
(e) How many times more did the registrations in West Bengal increase from 2022 to 2024?
(f) Is this statement correct – There were very few new registrations in Uttarakhand in 2023 and 2024, as the increase in the bar lengths is minimal”?
Solution:
(a)

(b) The scale used is 1 unit = 25000 vehicles.
(c) All states show growth in electric vehicle registration from 2022 to 2024, with larger increases in Gujarat, Delhi, and West Bengal, and smaller increases in Uttarakhand.
(d) Registrations in Assam in 2022 = 40,000 Registrations in Assam in 2023 = 60,000 Difference in registrations = 60,000- 40,000 = 20,000.
Therefore, Assam got 20,000 more registrations in 2023 compared to 2022.
(d) Registrations in West Bengal in 2022 = 11,000
Registrations in West Bengal in 2024 = 44,000
Since, \(\frac{ 44,000}{11,000}\) = 4
Therefore, the registrations increased four times in West Bengal from 2022 to 2024.
(e) Yes, the statement is correct.

Figure it Out (Page: 129-134)

Question 1.
The dot plots below show the distribution of the number of pockets on clothing for a group of boys and for a group of girls.

Based on the dot plots, which of the following statements are true?
(a) The data varies more for the boys than for the girls.
Solution:
False

(b) The median number of pockets for the boys is more than that for the girls.
Solution:
True

(c) The mean number of pockets for the girls is more than that for the boys.
Solution:
False

(d) The maximum number of pockets for boys is greater than that for the girls.
Solution:
True

Question 2.
The following table shows the points scored by each player in four games:

Now answer the following questions :
(a) Find the average number of points scored per game by A.
(b) To find the mean number of points scored per game by C, would you divide the total points by 3 or by 4 ? Why? What about B?
(c) Who is the best performer?
Solution:
(a) Average number of points per game by A. Average A

= \(\frac{14+16+10+110}{4}\) = \(\frac{ 50}{4}\)
= 12.5 points per game

(b) To determine the best performer, we compare the average scores of all players.
Average A = 12.5 points/game
Average B = \(\frac{0+8+6+4}{4}\) = \(\frac{18}{4}\) = 4.5 points/ game
Average C = \(\frac{8+11+13}{3}\) = \(\frac{32}{3}\) = 10.67 points/ game
Comparing
(12.5 > 10.67 > 4.5); Player A has the highest average.
(c) The best performer based on the average points scored per game, is player A.

Question 3.
The marks (out of 100) obtained by a group of students in a General Knowledge quiz are 85, 76, 90, 85, 39, 48, 56, 95, 81 and 75. Another group’s scores in the same quiz are 68, 59, 73, 86, 47, 79, 90, 93 and 86. Compare and describe both the groups performance using, mean and median.
Solution:
Group 1
(a) Mean (Average) score :
Sum of scores :
85 + 76 + 90 + 85 + 39 + 48 + 56 + 95 + 81 +
75 = 730

(b) Median score
First, arrange the scores in ascending order 39, 48, 75, 76, 81, 85, 85, 90, 95
Since there are an even number of scores (10), the median is the average of the two middle values (the 5th and 6th scores) :
Median₁ = \(\frac{76+81}{2}\) = \(\frac{ 157}{2}\) = 78.5

Group 2
Mean :
Sum of scores :
68 + 59 + 73 + 86 + 47 + 79 + 90 + 93 + 86
= 681

= \(\frac{ 681}{9}\) = 75.67 (approx.)

Median score :
First, arrange the scores in ascending order :
47, 59, 68, 73, 79, 86, 86, 90, 93
Since there is an odd number of scores (9), the median is the single middle value (the 5th score) :
Median₂ = 79

Comparison :

Metric	Group 1	Group 2
Mean	73	75.67(approx)
Median	78.5	79

Comparison :

• Group 2 has a higher mean and median, so overall Group 2 performed better.
• Group 1 has a lower mean due to very low scores (39, 48), which affected its average.

Question 4.
Consider this data collected from a survey of a colony.

Solution:

Observations:
Cricket is the most popular sport for both watching and participating.
More people watch sports than participate in them across all categories.
Athletics has the lowest numbers for both watching and participating.
Basketball and swimming have similar participation numbers, but more people watch swimming than Basketball.

Question 5.
Consider a group of 17 students with the following heights (in cm): 106, 110, 123, 125, 117, 120, 112, 115, 110, 120, 115, 102, 115, 115, 109, 115, 101. The sports teacher wants to divide the class into two groups so that each group has an equal number of students: one group has students with height less than a particular height and the other group has students with heights greater than the particular height. Suggest a way to do this. Can you guess the age of these students based on the tabular data in the ‘Telling Tall Tales’ section?
Solution:
17 is an odd number that cannot be divided into two perfectly equal groups.
Arranging the heights of students in increasing order.
101,102,106,109,110,110,112,115,115, 115,115,115,117,120,120,123,125
Mean = \(\left(\frac{17+1}{2}\right)^{\mathrm{th}}\) = 9th term
= 115 cm
Arranging to the conditions given in the question, the height used to divide the students into two groups be 112 < height < 115
If we take 114 cm as the required height, then
Group 1 (Less than 114 cm) – 101, 102, 106, 109, 110, 112
Total = 7 Students
Group 2 (More than 114 cm) – 115, 115, 115, 115, 115, 117, 120, 120, 123, 125
Total = 10 students

Question 6.
Describe the mean and median of heights of your class. You can visualise the heights on a dot plot. (Suggested answer)
Solution:

The data set in order is :
145, 148, 148, 150, 150, 150, 152, 152, 152, 152, 155, 155, 155, 155, 155, 158, 158, 158, 160, 160
Mean = Sum of all 20 heights = 3074 cm
Mean height = \(\frac{3074}{20}\) = 153.7 cm
Average height of a student in the class is 153.7
Median = is the average of the 10th or 11th values in the ordered list

• 10th value = 152 cm
• 11th value = 155 cm

Median height = \(\frac{152+155}{2}\) = 153.5 cm
So median tells us that half the students in the class are shorter than 153.5 cm , and half are taller than 153.5 cm. Most students cluster around the 152 cm to 155 cm range.

Question 7.
There are two 7th grade sections at a school. Each section has 15 boys and 15 girls. In one section, the mean height of students is 154.2 cm. From this information, what must be true about the mean height of students in the other section?
(a) The mean height of students in the other section is 154.2 cm.
(b) The mean height of students in the other section is less than 154.2 cm.
(c) The mean height of students in the other section is more than 154.2 cm.
(d) The mean height of students in the other section cannot be determined.
Solution:
The correct answer is (d) The mean height of students in the other section cannot be determined.
Explanation: The fact that both 7th grade sections have the same number of students (15 boys and 15 girls) and are in the same grade does not guarantee that their average heights are identical.
The mean height is calculated based on the specific individual heights of each student in that particular section. Since no data or constraints were provided for the heights in the second section, its mean height could be less than, equal to, or greater than 154.2 cm. The information given is insufficient to determine the other section’s mean height with certainty.

Question 8.
Standing tall in the storm.

(a) Write estimated values for the number of skyscrapers in New York, Tokyo, and London.
(b) Are the following statements valid?
(i) Only 12 cities have more skyscrapers than Mumbai.
(ii) Only 7 cities have fewer skyscrapers than Mumbai.
(iii) The tallest building in the world is in Hong Kong.
Solution:
(a) Estimated values for the number of skyscrapers in
New York – 38
Tokyo – 160
London – 305

(b) (i) Valid
(ii) Valid
(iii) Invalid

Question 9.
Estimate and then measure the objects listed in the following table. Draw a double bar graph based on the data. How accurate were your estimates? Find the average difference between the estimated and measured values.

Solution:

The estimates are quite accurate, as the difference between estimated and measured values is very small for all objects.
Average difference = \(\frac{1+0.5+2+1.5+1}{5}\)
= \(\frac{ 6}{5}\) = 1.2

Question 10.
Aditi likes solving puzzles. She recently started attempting the ‘Easy’ level Sudoku puzzles. The time she took (in seconds) to solve these puzzles are – 410, 400, 370, 340, 360, 400, 320, 330, 310, 320, 290, 380, 280, 270, 230, 220,
240. The first nine values correspond to Week 1 and the rest to Week 2.

(a) Construct a dot plot below showing the data for both weeks.
(b) Describe the mean, median, and any observations you may have about the data.

Solution:

= \(\frac{ 5470}{17}\) = 321.76 ≈ 321 Sec.
Arranging in ascending order:
220, 230, 240, 270, 280, 290, 310, 320, 320, 330, 340, 360, 370, 380, 400, 400, 410
With 17 values, the median is the 9th value. So median = 320 sec.

Question 11.
Individual Project: Pick at least one of the following:
(a) How Long is a Sentence? Pick any two textbooks from different subjects. Choose any page with a lot of text from each book.
(i) Use a dot plot to describe how many words the sentences have on each page.
(ii) Compare the data of both the pages using mean and median.

(b) What is in a Name? Write down the names of all of your classmates. The following are some interesting things you can do with this data!
(i) Find the mean and median name length (number of letters in a name).
(ii) Visualise the data and describe its variability and central tendency.
(iii) Which starting letters are more popular? Which are less popular?
(iv) What is the median starting letter? What does this say about the number of names starting with the letters A-M and N-Z?
(v) Plot a double-bar graph showing the number of boys’ names and girls’ names that:

• start and end with vowels,
• start with vowels and end with consonants,
• start with consonants and end with vowels,
• start and end with consonants.

Solution:
Do it yourself.

Question 12.
Individual project (long term) : This requires collecting data over 2 weeks or more. In and Out : Track how many times you step out of your house in a day. Do this for a month.
(i) Describe the variability and central tendency of this data. Make a dot plot.
(ii) Do you find anything interesting about this data? Share your observations.
(iii) You can ask any of your family members or friends to do this as well.
Solution:
Do it yourself.

Question 13.
Small-group project: Pick at least one of the following. Make groups of 8 to 10. Collect data individually as needed. Put together everyone’s data and do the appropriate analysis and visualisation.
(a) Our heights vs. our family’s heights: Collect the heights of your family members.
(i) Make a dot plot showing heights of just your family members. Describe its variability and central tendency.
(ii) Make a double-bar graph showing each student’s height next to their family’s mean height.
(iii) Look at everyone’s data and share your observations.
(b) Estimating time: Check the time and close your eyes. Open them when you think 1 minute has passed (no counting). Note down after how m-any seconds you opened your eyes. Collect this data for yourself and for your family members. Repeat this activity to estimate 3 minutes.
(i) Make two dot plots (for 1 minute and 3 minutes) showing estimates of just your family members.
(ii) Mark these on the respective dot plots. Describe its variability and central tendency.
(iii) Make a double bar graph showing each family’s mean 1 minute estimate and mean 3 minute estimate.
(iv) Look at everyone’s data and share your observations.
Solution:
Do it yourself.

Detailed Understanding Society India and Beyond Class 9 Solutions and Class 9 Social Science SST Chapter 7 Elections Question Answer NCERT Solutions make it easier to complete textbook exercises.

Class 9 SST Chapter 7 Elections Question Answer

Class 9 Elections Question Answer

The Big Questions (Page No. 161)

Question 1.
Why are elections essential to a democratic system?
Answer:
Elections are essential in a democratic system because they allow citizens to choose their representatives, ensure accountability of the government, and provide a peaceful method for the transfer of power. They also strengthen public participation and give legitimacy to the government formed through the people’s mandate.

Question 2.
How do electoral systems and rules shape political representation and fairness? (Page No. 161)
Answer:
Electoral systems determine how votes are converted into seats, which directly affects representation and fairness. For example, the FPTP system gives victory to the candidate with the most votes, while Proportional Representation allocates seats according to vote share. Rules like universal adult franchise and delimitation ensure equal participation and balanced representation across regions.

Question 3.
What role do institutions and laws play in ensuring free and fair elections?
Answer:
Institutions and laws play the following role in ensuring free and fair elections.

• Institutions like the Election Commission of India conduct, supervise, and control the entire election process, ensuring that elections are free from bias and manipulation.
• Laws such as the Representation of the People Act and the Model Code of Conduct regulate electoral activities, prevent malpractice, and ensure transparency and fairness in elections.

Question 4.
What challenges do elections face in practice, and how can these challenges affect democracy?
Answer:
Elections face challenges such as misinformation, misuse of money and power, fake news, and unfair practices. These issues can reduce voter trust, influence voting decisions unfairly, and weaken democratic values. However, measures like the Model Code of Conduct, voter awareness campaigns, and strict laws help reduce these challenges and protect democracy.

Elections Question Answer Class 9

InText Questions

Question 1.
Different democracies use different electoral systems. Make groups of 5-6 students. Each group will select six countries from different continents. Prepare and present a case study on the type of electoral system(s) operating in those countries, and discuss their latest election results of those countries. (Page No. 165)
Answer:
Do it yourself.

Question 2.
Article 82 of the Constitution of India mandates the establishment of a Delimitation Commission. India has had four Delimitation Commissions—in 1952, 1963, 1973 and 2002. Can you find out the reason for the long interval between 1973 and 2002 with the help of your teacher? (Page No. 166)
Answer:
The reason for the long interval between the Delimitation Commissions of 1973 and 2002 is as follows:

• The 42nd Constitutional Amendment Act, 1976 froze the readjustment of Lok Sabha and State Legislative Assembly constituencies based on the 1971 Census until after the 2001 Census.
• This freeze was introduced to ensure that states which had successfully implemented family planning programmes were not disadvantaged by losing parliamentary seats due to slower population growth.
• As a result, no Delimitation Commission was constituted between 1973 and 2002.
• After the 84th Constitutional Amendment Act, 2001, constituency boundaries were permitted to be redrawn based on the 2001 Census (although the total number of seats remained frozen until after the first Census conducted after 2026).
• Therefore, the next Delimitation Commission was established in 2002.

Question 3.
You will turn 18 in a few years. As a responsible citizen, you should register yourself as a voter. Find out the various steps of the procedure for registration and the list of required documents for the same. Discuss, with anyone who has just turned 18 and has registered as a voter, the ease or difficulty faced in the voter registration process. (Page No. 168)
Answer:
As a responsible citizen, once a person turns 18, they can register as a voter through the Election Commission of India.
Steps for Voter Registration:

1. Visit the official voter registration portal or Electoral Registration Office.
2. Fill Form 6 (application for new voter registration).
3. Submit personal details such as name, age, address, and constituency.
4. Upload required documents online or submit them offline.
5. Verification is done by officials/Enumerators through field checks.
6. After verification, the name is added to the Electoral Roll and a Voter ID is issued.

Required Documents:

1. Proof of age (Birth certificate, Aadhaar card, etc.)
2. Proof of address (Electricity bill, ration card, etc.)
3. Passport-size photograph
4. Identity proof (Aadhaar card/PAN card, etc.)

Discussion on Experience: Many first-time voters find the process simple and accessible, especially due to online registration. However, some may face minor difficulties such as document errors, address mismatch, or delays in verification. Overall, the process is designed to be transparent and citizen-friendly to encourage participation in democracy.

Question 4.
Do you know what ETPBS is? Find out who is classified as service voters and who can vote using ETPBS. (Page No. 168)
Answer:
ETPBS (Electronically Transmitted Postal Ballot System) is a system developed by the Election Commission of India that allows eligible voters to receive postal ballots electronically and cast their vote from a remote location. It is mainly used to ensure that voters who are not physically present in their constituency can still participate in elections.
Service voters are those citizens who are

• Members of the Armed Forces (Army, Navy, Air Force).
• Members of the Armed Police Forces of a state serving outside that state.
• Government of India employees posted outside India.

ETPBS facility is available for the following.

• Service voters (armed forces and paramilitary personnel posted away from home constituency).
• Government officials posted abroad in Indian embassies/missions.
• In some cases, their eligible spouses who are registered as service voters.

Question 5.
Choose any three states (including yours). Find the symbols of state parties belonging to those states and plot them on the given map of India. List their major agenda, as mentioned in their manifesto in the latest Lok Sabha/Vidhan Sabha/Local Body Elections. (Page No. 173)

Answer:

1. Uttar Pradesh
Political Party: Samajwadi Party (SP)
Symbol: Bicycle
Major Agenda (Manifesto points):

• Employment opportunities for youth.
• Strengthening farmers’ income support.
• Better education and health facilities.
• Social justice and welfare schemes for weaker sections.

2. Maharashtra
Political Party: Shiv Sena (UBT faction)
Symbol: Flamingo Torch
Major Agenda (Manifesto points):

• Protection of Marathi identity and culture.
• Urban development of Mumbai and other cities.
• Employment generation and infrastructure growth.
• Welfare schemes for farmers and workers.

3. West Bengal
Political Party: All India Trinamool Congress (TMC)
Symbol: Flowers and Grass
Major Agenda (Manifesto points):

• Social welfare schemes for women and poor families.
• Development of education and healthcare sectors.
• Infrastructure and rural development.
• Employment generation and poverty reduction.

Question 6.
Form groups of 4-6 students. Identify and compare the policy preferences on the following parameters for two political parties in the last Lok Sabha Elections using credible sources like party manifestos, newspapers, etc. Present the points of comparison in a poster using bullet points, symbols, colour coding, etc. (Page No. 174)

Answer:
Below is a sample comparison of the Bharatiya Janata Party (BJP) and the Indian National Congress (INC) based on their 2024 Lok Sabha election manifestos.

Question 7.
Find out the number of State parties and Registered Unrecognised Political Parties (RUPP). You may visit the website of ECI. (Page No. 176)
Answer:
According to the latest information available from the Election Commission of India (ECI):

• Recognised State Parties: 67
• Registered Unrecognised Political Parties (RUPPs): 2,854 (before the 2025 delisting exercise)

Question 8.
Find out the name and the composition (number and name of the national and state parties) of the alliances that won in the following elections to the Lok Sabha. (Page No. 177)

Answer:

Year	Alliance Won	National Parties	State Parties (Names)
1977	Janata Alliance (Janata Party-led)	Janata Party, CPI(M) (supported in many areas but not a formal member)	DMK, Akali Dal, National Conference and other regional allies
1999	National Democratic Alliance (NDA)	BJP, Janata Dal (United)	Shiv Sena, Shiromani Akali Dal (SAD), Biju Janata Dal (BJD), Telugu Desam Party (TDP), Trinamool Congress (AITC), DMK, National Conference, MDMK, PMK and others
2004	United Progressive Alliance (UPA)	Indian National Congress (INC), Nationalist Congress Party (NCP)	DMK, Rashtriya Janata Dal (RJD), Jharkhand Mukti Morcha (JMM), Telangana Rashtra Samithi (TRS), Lok Janshakti Party (LJP), PMK and others
2009	United Progressive Alliance (UPA)	INC, NCP	DMK, Trinamool Congress (AITC), National Conference, JMM, Indian Union Muslim League (IUML) and others
2014	National Democratic Alliance (NDA)	BJP	Shiv Sena, Telugu Desam Party (TDP), Lok Janshakti Party (LJP), Shiromani Akali Dal (SAD), Apna Dal, PMK and others
2019	National Democratic Alliance (NDA)	BJP, JD(U)	Shiv Sena, LJP, AIADMK, Apna Dal (S), SAD, AGP and others
2024	National Democratic Alliance (NDA)	BJP, JD(U)	Telugu Desam Party (TDP), Shiv Sena (Eknath Shinde), Lok Janshakti Party (Ram Vilas), Apna Dal (S), Janasena Party, Rashtriya Lok Dal (RLD), AGP and others

Question 9.
Look at the road to free and fair elections given below. Fill in the empty potholes with challenges after discussing them with your teachers and parents. How can we overcome these challenges? (Page No. 178)

Answer:
Challenges in Free and Fair Elections (Potholes):

• Intimidation of voters and candidates
• Misinformation and fake news
• Money power and vote buying

Overcoming Challenges:

• Strict enforcement of the Model Code of Conduct (MCC) by the Election Commission of India.
• Use of technology and monitoring systems to track fake news and misinformation.
• Strict legal action and punishment against vote buying and electoral violence.

Elections Class 9 Questions and Answers

Questions and Activities (Page No. 179-182)

Question 1.
What reforms have been introduced by the ECI to make voting more inclusive for the following groups?
(a) People with Disabilities
(b) Service Voters
(c) Senior Citizens-60 years and above; and 80 years and above
(d) Prisoners
(e) Persons in preventive detention
Answer:
The following reforms have been introduced by the ECI to make voting more inclusive.
(a) People with Disabilities (PwDs): The ECI ensures accessibility by improving infrastructure and using technology-based solutions. It also provides support through the Saksham App, which helps PwDs with voter registration, polling station details, and voting assistance.

(b) Service Voters: The ECI has introduced the ETPBS (Electronically Transmitted Postal Ballot System), allowing service voters to receive and cast postal ballots electronically from outside their constituency.

(c) Senior Citizens (60+ and 80+ years): Senior citizens are given special voting facilities for easier access. Those above 85 years of age can vote from home, ensuring greater convenience and participation.

(d) Prisoners: Prisoners are included in voter lists where eligible, and their voting rights are managed according to legal provisions, ensuring fair inclusion in the electoral process.

(e) Persons in Preventive Detention: Persons in preventive detention are also covered under electoral provisions, and their voting rights are regulated as per eligibility rules to ensure fair participation.

Question 2.
What are the various functions of the Election Commission of India? Which of these functions is most important for the conduct of free and fair elections? Explain.
Answer:
The various functions of the Election Commission of India are as follows.

• Preparation and revision of electoral rolls.
• Conducting elections for Lok Sabha, Vidhan Sabha, President and Vice-President.
• Registration of political parties and allocation of symbols.

The most important function is ensuring free and fair elections. This is crucial because it builds public trust, prevents malpractice, and ensures elections are conducted transparently and impartially, strengthening democracy.

Question 3.
Elections are the soul of a democracy. Do you agree? Why or why not?
Answer:
Yes, I agree that elections are the soul of a democracy because they ensure that citizens choose their representatives through regular and free voting. Elections provide accountability, as leaders can be voted out if they do not perform well. They also ensure peaceful transfer of power, representation of diverse groups, and protection against authoritarian rule. Without elections, people would have no way to express their will, making democracy incomplete.

Question 4.
Explain at least three differences between the national and state/regional political parties.
Answer:
The three differences between national and regional parties are as follows.

Basis	National Party	State/Regional Party
Area of Influence	Works across India	Works mainly within a state or region
Recognition	Recognised in multiple states by the ECI based on national criteria	Recognised within a particular state by ECI
Electoral Reach	Contests elections in many states and Lok Sabha elections widely	Mainly contests State Legislative Assembly elections and limited Lok Sabha seats
Objective	Focuses on national issues and policies	Focuses on regional issues and local needs

Question 5.
Why should you vote? Arrange the following in the descending order of your choice. Discuss the reasons for your choice.
(a) Opportunity to choose my representative
(b) Makes me a responsible person
(c) Opportunity to change the non-performing representative
(d) Strengthens democracy
Answer:
We should vote because it is our democratic right and duty. It helps choose representatives, ensures accountability, allows change of leaders, and strengthens democracy through active public participation.
Descending order of choice:
(d) Strengthens democracy
(a) Opportunity to choose my representative
(c) Opportunity to change the non-performing representative
(b) Makes me a responsible person
Reasons: Strengthening democracy is most important because elections keep the system fair and active. Choosing a representative is the core purpose of voting. Changing non-performing leaders ensures accountability. Becoming a responsible person is also important, but it is a personal outcome rather than the main democratic function of voting.

Question 6.
What is the Special Intensive Revision (SIR) initiative of the ECI? Explain the objectives and the necessity of conducting SIR.
Answer:
The Special Intensive Revision (SIR) is an initiative of the Election Commission of India to update, verify, and correct electoral rolls.
Objectives:

• To add new eligible voters, especially those who have turned 18 years.
• To remove names of deceased, duplicate, or ineligible voters.
• To correct errors in voter details and ensure accurate electoral rolls.

It is necessary to ensure updated voter lists so that every eligible citizen is included and no ineligible person is allowed to vote, ensuring free and fair elections.

Question 7.
Match the political party name with its symbol.

Answer:
1. Aam Aadmi Party (AAP) – Broom
2. Bharatiya Janata Party (BJP) – Lotus
3. Bahujan Samaj Party (BSP) – Elephant
4. Communist Party of India (Marxist) [CPI (M)] – Hammer, Sickle and Star
5. Indian National Congress (INC) – Hand
6. National People’s Party (NPP) – Book

Question 8.
Read the case study below and answer the following questions.
Ishani and her mother were in the local market, the day before the state assembly elections. She noticed wall writing and campaign posters pasted everywhere. Large groups of campaigners were distributing pamphlets and raising slogans in support of the respective candidates. Ishani has turned 18 and will be voting for the first time. She had registered to vote through the ECI’S online portal. The next morning, she, along with her mother and her disabled elder brother, went to the polling station, which was well guarded by the police personnel. A wheelchair was made available to them, and volunteers guided them to the polling booth. Inside the polling booth, there were only three people who were performing all duties. Ishani had forgotten her voter ID card and Aadhaar card, but she was surprised as no one asked for them. After casting her vote, she was also able to see the WPAT slip. While leaving, she wondered how the police personnel vote, as they must be on duty from early morning till late evening. When she went home, she narrated her entire experience to her 89-year-old grandmother, who cast her vote from home.
(a) What initiatives were taken by the ECI to enable the voters to cast their vote?
(b) If Ishani was allowed to vote even without carrying her Voter ID card or Aadhaar card, which other document might she be carrying that is valid for voting?
(c) Cite examples of violations of the Model Code of Conduct.
(d) Give a suitable title to the passage.
(e) Find out how the police and army personnel cast their votes.
Answer:
(a) The following initiatives were taken by the ECI to enable the voters to cast their vote.

• Wheelchair facility and volunteer assistance were provided for persons with disabilities and elderly voters at polling stations.
• A home voting facility was provided to senior citizens above 85 years and eligible PwDs.
• WPAT system was used to help voters verify their vote and ensure transparency in the voting process.

(b) She might be carrying her name in the electoral roll (voter list) or any other approved identity proof as per ECI rules.
(c) The examples of violations of the Model Code of Conduct are

• Wall writings on public or private property.
• Campaign posters pasted on public or private places without permission.
• Loud slogans and mass campaigning in restricted or prohibited areas.

(d) “A Smooth and Inclusive Voting Experience”
(e) Police and army personnel vote through the ETPBS (Electronically Transmitted Postal Ballot System), where service voters receive and cast their votes electronically from their place of duty.

Question 9.
A comparative chart of three countries is given below. Based on the information given in the chart, answer the questions.

(a) What is the difference between having a voting right in a country with a multi-party system and another with a single-party system?
(b) In which of the above countries would you like to stay and why?
Answer:
(a) The differences between voting rights in a multi-party system and a single-party system are as follows.

Basis	Multi-party system	Single-party system
Choice of candidates	Voters have many parties and candidates to choose from, giving wider choice	Voters have only one party (or very limited options), so choice is restricted
Electoral Competition	Strong competition exists among different parties, making elections more meaningful	Little or no competition, as one party dominates the political system

(b) I would prefer to stay in a multi-party system country because it offers more political freedom, better choice of candidates, and healthy competition among parties. It also ensures accountability, as leaders can be replaced through elections if they do not perform well. This strengthens democracy and gives citizens a stronger voice in governance compared to a single-party system.

Question 10.
What are the challenges to conducting free and fair elections?
Answer:
The challenges to conducting free and fair elections are as follows.

• Misinformation and fake news that can mislead voters.
• Intimidation and unfair practices used to influence voters.
• Violation of the Model Code of Conduct and use of money or muscle power during elections.

Question 11.
On the Stage.
Elections are to be held in your school for the posts of Head Girl, Head Boy, and Sports Captain. Assume the roles of an Election Commissioner, Returning Officer, Polling Agent, Candidate, Campaigner, Polling Officer, Police Personnel, and a Journalist, and perform their roles while ensuring free, fair, and transparent elections.
Answer:
The roles can be performed in a free, fair, and transparent school election.

• Election Commissioner: Plans and supervises the entire election process, announces rules, and ensures fairness.
• Returning Officer: Manages nominations, prepares the voter list, and conducts the counting of votes.
• Polling Officer: Conducts voting at the booth, verifies voters, and maintains order during polling.
• Polling Agent: Represents candidates inside the polling booth and ensures no malpractice occurs.
• Candidate: Presents manifesto, participates in debates, and follows election rules.
• Campaigner: Helps candidates by spreading their ideas peacefully without violating rules.
• Police Personnel: Maintains discipline and security at the polling station.
• Journalist: Reports the election process, highlights fairness, and informs the school community.

Question 12.
Try to make videos or audio on topics like: My Vote My Nation; No Voter to be Left Behind; How to Eliminate the III of Money Power, etc.
Answer:
Do it yourself.

Question 13.
Select one national or state political party. Using authentic and reliable sources such as the Election Commission of India (ECI) website, the official website of the selected political party, and newspapers. Prepare a comparative chart of the last two State Legislative Assembly elections. The chart should include the following details for the chosen party:
(a) Some promises made in the Election manifesto
(b) Percentage of votes polled
(c) Number of seats won
(c) Number of women who contested
(e) Number of women candidates elected
Present the data for both elections in a clear and comparative format, citing all sources used.
Answer:
I am using the Bharatiya Janata Party (BJP) and comparing the last two Uttar Pradesh Legislative Assembly elections (2017 and 2022) based on reliable election data.
Comparative Chart: BJP in Uttar Pradesh Assembly Elections (2017 vs 2022)

Details	2017 UP Assembly Election	2022 UP Assembly Election
(a) Manifesto promises	Development, jobs, farmer welfare, law and order improvement	Double-engine growth, welfare schemes, women’s safety, employment, infrastructure expansion
(b) Vote share (%)	About 39.7%	About 41.3%
(c) Seats won	312 seats	255 seats
(d) Women candidates contested	Around 43 women candidates	Around 44 women candidates
(e) Women candidates elected	Around 29 women MLAs	Around 38 women MLAs

Sources (Reliable):

• Election Commission of India (ECI)
• Statistical Reports of Uttar Pradesh Assembly Elections (2017 & 2022), ECI
• Official BJP website
• Major newspapers: The Hindu, Indian Express (election analysis reports)

Question 14.
Do you think ‘One Nation, One Election’ can improve the efficiency of the electoral process? Divide the class and discuss in two groups-one to examine its potential advantages and the other to analyse its limitations.
Answer:
Do it yourself.

Detailed Understanding Society India and Beyond Class 9 Solutions and Class 9 Social Science SST Chapter 6 Democracy Question Answer NCERT Solutions make it easier to complete textbook exercises.

Class 9 SST Chapter 6 Democracy Question Answer

Class 9 Democracy Question Answer

The Big Questions (Page No. 137)

Question 1.
How has the idea of democracy evolved over time and shaped our understanding of it today?
Answer:
The idea of democracy has evolved from early collective decision-making systems in Vedic assemblies like Sabha and Samiti, where people participated in discussions, to modern constitutional democracy based on elections and rights. Over time, struggles for freedom and global democratic ideas shaped today’s system focused on equality, liberty, justice, and participation.

Question 2.
What are the different forms of democracy and how are they practiced in India and other parts of the world?
Answer:
The different forms of democracy and their practice in India and other parts of the world are

• Direct Democracy: In this form, citizens directly participate in decision-making. It is practiced in Switzerland.
• Representative Democracy: In this form, people elect representatives to govern on their behalf. It is practiced in India.
• Parliamentary Democracy: The executive is part of the legislature and is accountable to it, as in India and the UK.
• Presidential Democracy: The executive is independent of the legislature, as in the United States of America.

Question 3.
What are the essential features of a democracy and how do they extend beyond government institutions?
Answer:
The essential features of democracy are

• Popular Sovereignty, Rule of Law and Fundamental Rights: The people are the ultimate source of power, all are equal before the law, and citizens enjoy fundamental rights protected by the Constitution.
• Separation of Powers and Accountability: Power is divided among the legislature, executive, and judiciary, ensuring checks and balances, along with transparency and accountability in governance.
• Multi-Party System and Protection of Rights: Different political parties ensure representation of diversity, and democracy protects the rights of vulnerable groups.
  These features extend beyond government institutions, as democracy also functions in daily social life through media, civil society, cooperatives, trade unions, and citizen participation, making it a living system based on active involvement of people.

Question 4.
What are the challenges faced by Indian democracy?
Answer:
The challenges faced by Indian democracy are as follows.

• Illiteracy and Misinformation: Lack of education and fake news on social media mislead citizens and affect informed participation.
• Poverty and Inequality: Social and economic inequalities reduce equal participation in democratic processes.
• Regionalism and Social Discrimination: Divisions based on region, caste, gender, and religion weaken unity and fairness in participation.
• Weak Implementation of Laws: Poor enforcement of policies and rules reduces public trust in democratic institutions.

Democracy Question Answer Class 9

InText Questions

Question 1.
Why is it important that the ultimate source of power rests with the people in a democracy? (Page No. 140)
Answer:
The ultimate source of power must rest with the people in a democracy because

• People elect their representatives through free and fair elections, ensuring that the government derives its authority from the people.
• It makes the government accountable to the people, as citizens can evaluate its performance and choose their leaders through regular elections.

Question 2.
How does people’s participation through voting strengthen popular sovereignty? (Page No. 140)
Answer:
People’s participation through voting strengthens popular sovereignty in the following ways.

• It allows citizens to choose their representatives, ensuring that the government derives its authority from the will of the people.
• It enables people to take part in the governance of the country, making them the ultimate source of power in a democracy.

Question 3.
The Constitution not only guarantees Fundamental Rights to citizens but also outlines their Fundamental Duties and the Directive Principles of State Policy. Discuss their significance and identify the differences among them. (Page No. 141)
Answer:
The Fundamental Rights, Fundamental Duties, and Directive Principles of State Policy (DPSPs) are significant because they help strengthen democracy, protect citizens, and guide the government in promoting social welfare. The differences among them are as follows.

Basis	Fundamental Rights	Fundamental Duties	Directive Principles of State Policy
Purpose	Protect the rights and freedoms of citizens	Promote responsible citizenship	Guide the government in governance and policy-making
Applicability	Available to citizens (and some to all persons)	Expected to be followed by citizens	Meant for the State/Government
Enforceability	Enforceable in courts	Not enforceable in courts	Not enforceable in courts
Focus	Rights and freedoms	Duties and responsibilities	Social and economic welfare

Question 4.
The Right to Education (Article 21A) was added in 2009, ensuring free and compulsory education for children aged 6 to 4. Discuss its significance. (Page No. 141)
Answer:
The significance of the Right to Education (Article 21A) is as follows.

• It ensures free and compulsory education for children, helping every child access basic education regardless of social or economic background.
• It promotes equality and social development by providing educational opportunities to all children and empowering them to become informed and responsible citizens.
• It strengthens democracy by creating an educated population that can understand its rights and duties and participate effectively in democratic processes.

Question 5.
What do you think would happen if the same organ of the government made laws, implemented them and enforced them? Share your opinion with your classmates. (Page No. 142)
Answer:
If the same organ of the government made laws, implemented them, and enforced them, power would become concentrated in one institution. This could lead to the misuse of authority and arbitrary decision-making. There would be no effective system of checks and balances to hold the government accountable.

Citizens’ rights and freedoms might also be threatened because there would be no independent body to review or challenge unfair laws and actions. Therefore, the separation of powers among the Legislature, Executive and Judiciary is essential for protecting democracy, ensuring accountability and safeguarding citizens’ rights.

Question 6.
The first column of the table below lists some key features of democracy in India. Fill in the second column with suitable examples from your state, town or village. One row has been completed for you. (Page No. 145)

Answer:

Features of Democracy	Examples
Popular Sovereignty	Citizens elect their representatives through free and fair elections at the national, state, and local levels.
Rule of Law	Courts ensure that all persons are equal before the law and that disputes are settled according to legal procedures.
Separation of Powers	The Legislature makes laws, the Executive implements them, and the Judiciary interprets them and reviews unconstitutional laws.
Fundamental Rights	Citizens enjoy freedoms such as freedom of speech and expression and can approach courts to enforce their rights.
Accountability and Transparency	Parliamentary procedures such as Question Hour and the auditing of government accounts ensure accountability. Laws like the Right to Information provide transparency.
Multi-Party System	Different political parties contest elections, allowing voters to choose from a variety of candidates and policies.

Question 7.
Select your ideal team from the given image and give reasons for your selection. (Page No. 148)

Answer:
I would choose Team B because it follows the principles of representative democracy. Students first elect their class representatives, who then elect the Students’ Council President. The President and the representatives make decisions together, ensuring participation, accountability, and shared decision-making. This system also prevents the concentration of power in one person and reflects the democratic model followed in countries like India.

Question 8.
Work in pairs or small groups. Choose any two of India’s neighbouring countries and find out the following. (Page No. 149)

• Does the country hold regular elections?
• Who chooses the Head of the Government?
• Is there more than one political party?
• How much freedom do citizens have to express their opinions and criticise the government?
• How would you describe this system? Give reasons for your answer: Democratic, Partially Democratic or Non-Democratic.

Answer:
I have chosen Bangladesh and China

Criteria	Bangladesh	China
Does the country hold regular elections?	Yes, regular elections are held.	No competitive national elections are held.
Who chooses the Head of the Government?	The Prime Minister is chosen through the parliamentary system after elections.	The leadership is chosen by the ruling Communist Party.
Is there more than one political party?	Yes, multiple political parties exist and contest elections.	Other minor parties exist, but the Communist Party dominates political power.
Freedom to express opinions and criticise the government	Citizens have freedom of expression, though there are some restrictions and concerns regarding political freedoms.	Freedom of expression and criticism of the government is significantly restricted.
Type of System	Partially Democratic	Non-Democratic
Reason	Elections and multiple parties exist, but concerns remain regarding the fairness of political competition and freedoms.	Political power is concentrated in a single dominant party and citizens have limited political freedoms.

Question 9.
A democratic system seeks to promote participation, ensure fairness, limit the concentration of power, and resolve disagreements peacefully. Identify examples from the above case study that reflect these features. (Page No. 152)
Answer:
The case study reflects democratic features in the following ways.

• Participation: Citizens actively participated in decision-making through elections, Gram Sabhas, and local self-government institutions.
• Fairness: Equal voting rights under Universal Adult Franchise ensure that all adult citizens can participate in the democratic process without discrimination.
• Limiting the Concentration of Power: The separation of powers among the Legislature, Executive, and Judiciary prevents any one institution from becoming too powerful.
• Peaceful Resolution of Disagreements: Public debates, discussions, elections, courts and democratic institutions help resolve differences and conflicts through lawful and peaceful means.

Question 10.
India continues to work towards more inclusive institutions. Discuss in class the advantages of increased representation of women in the legislature. (Page No. 153)
Answer:
Increased representation of women in the legislature has the following.

• It promotes gender equality by ensuring that women have a greater role in decision-making and governance.
• It makes institutions more inclusive and representative, as women’s perspectives and concerns are reflected in laws and policies.
• It encourages women’s participation in public life and politics, inspiring more women to take leadership roles.
• It helps address issues related to health, education, sanitation, and social welfare more effectively, contributing to overall development.
• It strengthens democracy by ensuring broader participation and representation of all sections of society.

Question 11.
As we studied in earlier grades, the village serves as a unit of grassroots democracy in India, empowering rural communities to participate in decision-making processes. Many Indian leaders, such as Chaudhary Charan Singh and Babu Jagjivan Ram, who emerged from these rural backgrounds, advocated for the rights of the rural poor and other marginalised sections of society. Explore and discuss the contributions of eminent Indian leaders who worked towards strengthening grassroots democracy. (Page No. 154)
Answer:
Eminent Indian leaders have made significant contributions towards strengthening grassroots democracy in India. Some of them are

• Chaudhary Charan Singh worked for the welfare of farmers and rural communities. He advocated policies that protected the interests of the rural poor and promoted their participation in governance.
• Babu Jagjivan Ram worked for the upliftment of marginalised sections of society, especially Scheduled Castes. He promoted social justice, equality, and greater representation of weaker sections in public life.

Question 12.
In small groups, identify two or three examples of information shared on social media that you believe may be misleading or false. Discuss what made you question their reliability and how such information can influence people’s opinions. Reflect on why access to accurate and authentic information is important in a democracy. (Page No. 155)
Answer:
Examples of information on social media that may be misleading or false include fake news about elections, edited videos that present events out of context, and unverified messages claiming government schemes or policies that do not actually exist. These posts may be unreliable because they often come from unknown sources, lack evidence, contain exaggerated claims, or are not supported by trustworthy news reports or official statements. Such misinformation can influence people’s opinions by creating confusion, spreading rumours, and shaping public views based on incorrect facts.

Access to accurate and authentic information is important in a democracy because it helps citizens form informed opinions on public issues, understand how democracy functions and participate responsibly in decision-making. Reliable information also promotes transparency, accountability, and trust in democratic institutions.

Question 13.
Observe the figure and explore the various other digital and non-digital ways through which you can participate in a democracy. (Page No. 156)

Answer:
We can participate in a democracy through understanding the Constitution, participating in nation-building activities such as NCC, NSS, Bharat Scouts & Guides, following Fundamental Duties, being media literate, and taking leadership in school and community. These ways help citizens become responsible and active participants in democracy.

Question 14.
Think: How do your actions as a student contribute to your school community and to democracy in a larger context?
Discuss: Talk to your classmates about a social or community issue that you care about. How can you, as a student, make a difference?
Act: Choose one activity to fulfil your civic responsibility this month. Reflect on how your actions contribute to strengthening democracy and community spirit. (Page No. 157)
Answer:
Think: As a student, my actions contribute to my school community by following rules, respecting teachers and classmates, participating in activities, and helping maintain discipline. In the larger context of democracy, these habits build responsibility, cooperation, and respect for others’ rights.

Discuss: One social issue I care about is cleanliness in my community. As a student, I can make a difference by spreading awareness, avoiding littering, encouraging others to keep surroundings clean, and participating in cleanliness drives.

Act: For my civic responsibility this month, I will take part in a cleanliness or tree-plantation activity. This will help improve my surroundings and strengthen democracy by promoting active participation, responsibility, and community spirit among citizens.

Democracy Class 9 Questions and Answers

Questions and Activities (Page No. 158-159)

Question 1.
Read the passage and answer the questions that follow.
A school cabinet was responsible for planning a Republic Day celebration, and members had different opinions on which activities to include. After a discussion, they decided to vote, and the activities supported by the majority were selected.
(a) Which democratic values are reflected in this situation?
(b) How does voting help resolve differences of opinion?
(c) Why is the majority decision important in a democracy?
(d) Mention responsibilities of elected representatives after a decision is made.
Answer:
(a) The democratic values reflected in this situation are discussion, participation, equality, and decision-making through voting. It also shows respect for others’ opinions.
(b) Voting helps resolve differences of opinion by giving everyone a fair chance to express their choice, and the option supported by the majority is selected, ensuring an acceptable decision for all.
(c) The majority decision is important in a democracy because it reflects the choice of most people and ensures a fair and workable outcome while maintaining unity in decision-making.
(d) The responsibilities of elected representatives after a decision is made include implementing the decision effectively, ensuring proper execution of planned activities, maintaining accountability, and working in the interest of all members.

Question 2.
How would democracy be affected if citizens stopped following laws and civic responsibilities? Explain with an example.
Answer:
Democracy would be affected in the following ways if citizens stopped following laws and civic responsibilities.

• Breakdown of Rule of Law: If laws are not followed, equality before the law weakens, and justice cannot be maintained properly.
• Loss of Public Order: Violation of rules leads to chaos, indiscipline, and difficulties in smooth governance.
• Weakening of Democratic Institutions: Government bodies find it difficult to function effectively due to lack of cooperation from citizens.
• Loss of Trust in Democracy: Continuous violation of laws reduces people’s faith in democratic systems and governance.

Question 3.
Which situation best reflects the idea of popular sovereignty and why?
(a) A law is passed without public discussion
(b) Citizens vote to choose their representatives
(c) A court gives a final judgment
(d) A minister takes an independent decision
Answer:
(b) Citizens vote to choose their representatives

Question 4.
The Rule of Law is violated when.
(a) Laws are applied equally to all
(b) Courts review government actions above the law
(c) Powerful individuals are treated above the law
(d) Citizens challenge laws through legal means
Answer:
(c) Powerful individuals are treated above the law.

Question 5.
Why is the Rule of Law essential for protecting democracy?
Answer:
The Rule of Law is essential for protecting democracy because

• It ensures equality before the law, meaning all citizens are treated equally, and no one is above the law.
• It prevents misuse of power by authorities and protects citizens’ rights through fair legal procedures and justice.

Question 6.
Is voting alone enough to make a country democratic? Support your answer with examples from the chapter.
Answer:
Voting alone is not enough to make a country democratic because democracy also requires rights, rule of law, accountability, and participation in decision-making.
For example, democracy is based on Fundamental Rights, Rule of Law, separation of powers, and transparency. But during the Emergency (1975-77), Fundamental Rights were suspended, and press freedom was restricted. Therefore, true democracy needs both voting and protection of democratic principles.

Question 7.
Social media allows people to express opinions freely.
(a) How can this strengthen democracy?
(b) How can it weaken democracy if used irresponsibly?
Answer:
(a) Social media can strengthen democracy in the following ways.

• It promotes freedom of expression by allowing citizens to share opinions on public issues.
• It increases public participation and awareness by spreading information quickly.

(b) Social media can weaken democracy if used irresponsibly in the following ways.

• It spreads fake news and misinformation, which can mislead people and create confusion.
• It can create social conflicts and divisions, affecting harmony and trust in society.

Question 8.
Write a paragraph on what democracy means to you as a young citizen.
Answer:
Democracy means to me a system where every citizen has equal rights, freedom, and opportunities to participate in decision-making. As a young citizen, it allows me to express my views, vote in the future, and be responsible towards society. It teaches equality, justice, and respect for laws, helping build a fair and strong nation.

Question 9.
Conduct a model parliament session or Gram Sabha in class on local issues-cleanliness, responsibilities towards public property, or school safety.
Answer:
Do it yourself.

Question 10.
Choose any one democratic institution in India (such as Parliament, Election Commission, Judiciary or Panchayat). Prepare a short note explaining.
(a) Its role in democracy.
(b) How it ensures accountability and participation?
Answer:
Panchayat
(a) The role of Panchayat in democracy is as follows.

• It is the basic unit of local self-government in rural areas.
• It looks after local issues like cleanliness, water supply, and sanitation.
• It brings democracy to the grassroots level by involving people in decision-making.

(b) The Panchayat ensures accountability through Gram Sabhas where villagers review work and ask questions. It promotes participation by involving local people in decision-making and encouraging inclusive representation of all sections.

Question 11.
What role does the Constitution play in strengthening democracy in India?
Answer:
The Constitution plays the following role in strengthening democracy in India.

• It provides the framework of government, defining the structure and functioning of democratic institutions.
• It guarantees Fundamental Rights, ensuring freedom, equality, and protection of citizens.
• It establishes the Rule of Law, making all citizens equal before the law.
• It ensures separation of powers and accountability, maintaining checks and balances among institutions.

Question 12.
What challenges do you think democracy in India faces today?
Answer:
The challenges faced by Indian democracy are as follows.

• Illiteracy and Misinformation: Lack of education and fake news on social media mislead citizens and affect informed participation.
• Poverty and Inequality: Social and economic inequalities reduce equal participation in democratic processes.
• Regionalism and Social Discrimination: Divisions based on region, caste, gender, and religion weaken unity and fairness in participation.
• Weak Implementation of Laws: Poor enforcement of policies and rules reduces public trust in democratic institutions.