Students can practice the best Class 7 Science MCQ and Heat Transfer in Nature Class 7 Science Curiosity Chapter 7 MCQ Online Test with Answers for exam preparation.
Class 7 Science Chapter 7 Heat Transfer in Nature MCQ
Heat Transfer in Nature MCQ Class 7
MCQ On Heat Transfer in Nature Class 7
Question 1.
Convection takes place in:
(a) liquids
(b) solids and gases
(c) solids
(d) liquids and gases
Answer:
(d) liquids and gases
Question 2.
Water is conserved by:
(a) making shapes
(b) making walls
(c) making aquifers
(d) none of these
Answer:
(a) making shapes
Question 3.
Three ways of heat transfer are:
(a) convection
(b) radiation
(c) conduction
(d) all of these
Answer:
(d) all of these
Question 4.
The poor conductor of heat is:
(a) clay
(b) gravel
(c) sand
(d) none of these
Answer:
(a) clay
Question 5.
The cooler air moves from sea to land in:
(a) sea breeze
(b) land breeze
(c) both (a) – (b)
(d) none of these
Answer:
(a) sea breeze
Question 6.
We wear light coloured clothes in:
(a) summer
(b) winter
(c) at night
(d) in a day
Answer:
(a) summer
Question 7.
The water in rivers, lakes, seas heats up due to:
(a) sun
(b) cloud
(c) sky
(d) none of these
Answer:
(a) sun
Question 8.
The water seeps fast through the:
(a) gravel
(b) sand
(c) soil
(d) none of these
Answer:
(a) gravel
Question 9.
Ground water is depleting due to:
(a) its extration
(b) decreased vegetation
(c) limited water infiltration
(d) all of the above
Answer:
(d) all of the above
Question 10.
By conduction, heat transfer occurs in:
(a) solids
(b) liquids
(c) gases
(d) all of these
Answer:
(d) all of these
Question 11.
What is the process by which heat is transferred in solids without movement of particles?
(a) Convection
(b) Radiation
(c) Conduction
(d) Evaporation
Answer:
(c) Conduction
Question 12.
Which material is a poor conductor of heat?
(a) Copper
(b) Iron
(c) Wood
(d) Aluminium
Answer:
(c) Wood
Question 13.
Why are cooking utensils made of metal?
(a) Metals are shiny
(b) Metals are strong
(c) Metals conduct electricity
(d) Metals are good conductors of heat
Answer:
(d) Metals are good conductors of heat
Question 14.
What happens to air when it is heated?
(a) It contracts
(b) It cools
(c) It becomes heavier
(d) It expands and rises
Answer:
(d) It expands and rises
Question 15.
Which process does not require a medium for heat transfer?
(a) Conduction
(b) Convection
(c) Radiation
(d) Evaporation
Answer:
(c) Radiation
Question 16.
Sea breeze occurs during:
(a) Day
(b) Night
(c) Both day and night
(d) Only in winter
Answer:
(a) Day
Question 17.
Land breeze occurs because:
(a) Land heats faster
(b) Sea cools faster
(c) Land cools faster
(d) Sea is cooler at night
Answer:
(c) Land cools faster
Question 18.
The warmth felt from the Sun is due to:
(a) Conduction
(b) Convection
(c) Evaporation
(d) Radiation
Answer:
(d) Radiation
Question 19.
In which direction does smoke from incense stick move?
(a) Downward
(b) Upward
(c) Sideways
(d) Random
Answer:
(b) Upward
Question 20.
Why do we wear woollen clothes in winter?
(a) They are thick
(b) They trap light
(c) They trap air which is a poor conductor
(d) They absorb water
Answer:
(c) They trap air which is a poor conductor
Question 21.
Which surface absorbs more heat?
(a) White
(b) Shiny
(c) Black
(d) Transparent
Answer:
(c) Black
Question 22.
What is the continuous movement of water on Earth called?
(a) Condensation
(b) Water cycle
(c) Infiltration
(d) Evaporation
Answer:
(b) Water cycle
Heat Transfer in Nature Class 7 Assertion Reason Questions
Given below are two statements, one is labelled as Assertion (A) while the other is labelled as Reason (R).
(a) Both (A) and (R) are true and (R) is correct explanation of (A).
(b) Both (A) and (R) are true and (R) is not correct explanation of (A).
(c) (A) is true but (R) is false.
(d) (A) is false but (R) is true.
1. Assertion (A): Radiation is a method of transfer of heat.
Reason (R): The process of heat transfer that does not require any medium is called convection.
Answer:
(c) (A) is true but (R) is false.
2. Assertion (A): Evaporation is a process where water changes into vapour and rises into the atmosphere.
Reason (R): Evaporation requires heat energy from the Sun or other sources.
Answer:
(a) Both (A) and (R) are true and (R) is correct explanation of (A).
3. Assertion (A): Sea breeze refers to the movement of cold air from sea towards land during day time.
Reason (R): Land breeze refers to the movement of cold air from land towards sea during at night.
Answer:
(b) Both (A) and (R) are true and (R) is not correct explanation of (A).
4. Assertion (A): Seepage of water into the ground is an important part of the water cycle.
Reason (R): Water that seeps into the ground becomes part of the groundwater.
Answer:
(a) Both (A) and (R) are true and (R) is correct explanation of (A).
5. Assertion (A): Conduction is the transfer of heat through a material without the movement of its particles itself.
Reason (R): In conduction, heat moves from the colder part to the hotter part of the material.
Answer:
(c) (A) is true but (R) is false.
Heat Transfer in Nature Class 7 Fill in the Blanks
1. Dark coloured clothes are comfortable in _______.
Answer:
winters
2. Convection is heat transfer by movement of liquid _______.
Answer:
gas
3. In winter you wear _______ clothes.
Answer:
woollen
4. _______ blows land to sea at night.
Answer:
Land breeze
5. Rain water falling on earth surface _______ into ground.
Answer:
seeps
6. Sand is cooler than water at _______.
Answer:
night
7. Hollow bricks keep warm a house in _______.
Answer:
winter
8. The smoke rises up when an agarbatti is _______.
Answer:
burnt
9. Evaporation of water occurs by plants via _______.
Answer:
transpiration
10. An increase in population _______ water.
Answer:
depletes
Heat Transfer in Nature Class 7 True or False
1. Ice stupas melts in summers.
Answer: True
2. The water gets heated by convention.
Answer: True
3. The air does not expand on heating.
Answer: False
4. Metals are bad conductors of heat.
Answer: False
5. Cups made up of clay are used to drink tea.
Answer: True
6. The smoke refers to a mixture of hot gases and minute solids released by burning candle.
Answer:
7. All objects do not radiate the heat.
Answer: True
8. Water exists as gas in form of water vapour.
Answer: True
9. Water seep at slowest rate in clay.
Answer: True
10. Water cycle is helpful for conserving water on our earth.
Answer: False
11. Seeped water is stored in eath surface.
Answer: False