The DAV Class 5 Science Solutions and DAV Class 5 Science Chapter 11 Question Answer – Our Solar System are essential study tools for DAV public school students in Class 5.
DAV Class 5 Science Chapter 11 Question Answer – Our Solar System
DAV Class 5 Science Ch 11 Question Answer – Our Solar System
Something To Know
A. Fill in the blanks.
Question 1.
The earth is sometimes known as the ______ planet.
Answer:
blue
Question 2.
The earth completes one rotation about its axis in ______ hours.
Answer:
24
Question 3.
The main members of the solar system are the sun and ______ planets.
Answer:
eight
Question 4.
The sun is a huge source and ______
Answer:
heat, light
Question 5.
Day and night occur on earth due to its ______ about its axis.
Answer:
rotation.
B. Match the following.
| Column I | Column II |
| 1. the ringed planet | (a) Mercury |
| 2. the largest planet | (b) Neptune |
| 3. a natural satellite | (c) Jupiter |
| 4. the windy planet | (d) Moon |
| 5. the smallest planet | (e) Saturn |
Answer:
| Column I | Column II | |
| 1. the ringed planet | e | (a) Mercury |
| 2. the largest planet | c | (b) Neptune |
| 3. a natural satellite | d | (c) Jupiter |
| 4. the windy planet | b | (d) Moon |
| 5. the smallest planet | a | (e) Saturn |
C. Tick (✓) the correct option.
1. The number of planets, in our solar system, is
(a) seven
(b) eight
(c) nine
(d) ten
Answer:
(b) eight
2. The planet, which reflects large amount of sunlight falling on it, is
(a) Mercury
(b) Mars
(c) Earth
(d) Venus
Answer:
(d) Venus
3. The planet Uranus is also known as a
(a) windy planet
(b) terrestrial planet
(c) jovian planet
(d) red planet
Answer:
(c) jovian planet
4. The correct statement, about the atmosphere of the planet named in it, is
(a) Venus has mostly carbon dioxide around it
(b) Mercury has mostly nitrogen around it
(c) Saturn has mostly helium around it
(d) Earth has mostly ozone around it
Answer:
(a) Venus has mostly carbon dioxide around it
5. The fourth and the sixth planets, of the solar system are, respectively
(a) Jupiter and Uranus
(b) Mars and Saturn
(c) Uranus and Jupiter
(d) Neptune and Saturn
Answer:
(b) Mars and Saturn
6. Consider the following statements about the Earth’s moon:
A. The moon is Earth’s natural satellite
B. We can see full moon after every 15 days
C. The moon is a non-luminous object
D. The moon takes nearly 18 days to complete one revolution around the earth
The statements, that are correct, are the statements:
(a) A and B
(b) B and D
(c) B and C
(d) A and C
Answer:
(d) A and C
7. The first Indian satellite is
(a) Kalpana
(b) Aryabhatta
(c) INSAT
(d) EDUSAT
Answer:
(b) Aryabhatta.
D. Answer the following Questions in brief.
Question 1.
Name the hottest planet in our solar system. Is it closest to the Sun?
Answer:
Venus is the hottest planet in our solar system. It is not the closest planet to the sun.
Question 2.
How much time does the earth take to
(a) revolve around the sun?
Answer:
About 365 days
(b) to complete one rotation about its own axis?
Answer:
24 hours
Question 3.
State the nature of the shape of orbit of planets.
Answer:
The shape of orbit of planets is elliptical.
Question 4.
Write the meaning of the term ‘Artificial Satellites’.
Answer:
Man-made satellites are called artificial satellites.
E. Answer the following Questions.
Question 1.
How is the sun useful to us?
Answer:
The sun is the main source of energy for the earth. Plants need sunlight to make food. All animals directly or indirectly take food from plants. Thus,
all living beings take energy from the sun. Thus, sun is necessary to sustain life on the earth.
Question 2.
Name the terrestrial planets. Why are they so called?
Answer:
Mercury, Venus, Earth and Mars are the terrestrial planets. These planets are mainly made up of rocks and metals and hence are called terrestrial planets.
Question 3.
State the conditions necessary for existence of life on a planet.
Answer:
Following are the necessary conditions for existence of life on a planet:
- Presence of atmosphere.
- Presence of liquid water on its surface.
- Right size and right distance from the sun; making it neither too hot nor too cold.
Question 4.
Why do we observe phases of moon?
Answer:
Only one face of moon is visible from the earth because it takes the same number of days to complete one rotation and one revolution. Due to this, we get to see different shapes of moon on different days of the month. These shapes are called the phases of the moon.
Question 5.
State two uses to which artificial satellites are being put.
Answer:
Two uses of artificial satellites:
- For transmission of radio and TV signals.
- For weather forecasting and remote sensing.
Value Based Questions
Question 1.
State the values displayed by the boss and the staff of the industrial unit.
Answer:
They are showing concern for the environment.
Question 2.
Do you think that it is advisable to use solar panels whenever, and wherever possible?
Answer:
Yes, it is advisable to use solar panels whenever, and wherever possible because it helps in saving our environment.
Something To Do
Question 1.
Make your own scrapbook of solar system by collecting data about sizes, distances, temperatures, etc. of its members.
Answer:
Do it yourself.
Question 2.
Observe the moon continuously for several nights. Make a sketch of moon every night. Try to find out the time
interval between full moon and new moon.
Answer:
Do it yourself.
Question 3.
Try to make a model of the Sun, Earth and Moon that shows the Earth orbiting the Sun, and the Moon moving around the Earth.
Answer:
Do it yourself.
Question 4.
Try to make riddles on ‘Planets’. One example is given below: I am a planet very close to the sun. I appear to be a tiny planet which is very hot. I have no moons but I orbit the sun very fast. Can you guess my name?
Answer:
Do it yourself.
DAV Class 5 Science Chapter 11 Solutions – Our Solar System
I. Multiple Choice Questions (MCQs)
1. Which planet is farthest from the sun?
(a) Neptune
(b) Uranus
(c) Saturn
(d) Jupiter
Answer:
(a) Neptune
2. Which is the second largest planet in the solar system?
(a) Jupiter
(b) Saturn
(c) Uranus
(d) Neptune
Answer:
(b) Saturn
3. Which planet does not have a solid surface?
(a) Venus
(b) Saturn
(c) Jupiter
(d) Uranus
Answer:
(d) Uranus
4. What is the total number of terrestrial planets in the solar system?
(a) Four
(b) Five
(c) Six
(d) Eight
Answer:
(a) Four
5. What is the total number of gaseous planets in the solar system?
(a) Four
(B) Five
(c) Six
(d) Eight
Answer:
(a) Four.
II. Fill in The Blanks
Question 1.
The ______ is our nearest neighbour in the universe.
Answer:
moon
Question 2.
The moon takes ______ days to complete one rotation on its axis.
Answer:
28
Question 3.
The moon takes ______ days to complete one revolution around earth.
Answer:
28
Question 4.
______ is the brightest planet.
Answer:
Venus
Question 5.
______ is the nearest planet to the sun.
Answer:
Mercury.
III. Write True/False
1. There are nine planets in the solar system.
2. Saturn is farthest from the sun.
3. Mercury is the smallest planet in the solar system.
4. All the gaseous planets are very far from the sun.
5. Artificial satellites revolve around the sun.
Answer:
1. There are nine planets in the solar system. (False)
2. Saturn is farthest from the sun. (False)
3. Mercury is the smallest planet in the solar system. (True)
4. All the gaseous planets are very far from the sun. (True)
5. Artificial satellites revolve around the sun. (False)
IV. Define The Following
Question 1.
Celestial body
Answer:
All natural bodies in the space^are called celestial bodies.
Question 2.
Planet
Answer:
A celestial body which revolves around a star is called a planet.
Question 3.
Satellite
Answer:
A celestial body which revolves around a planet is called a satellite.
Question 4.
Luminous body
Answer:
A body which produces its own light is called a luminous body.
Question 5.
Revolution
Answer:
Movement of a celestial body around a star or a planet is called revolution.
Question 6.
Solar Energy
Answer:
The energy from the sun is called solar energy.
V. Answer the Fllowing Questions
Question 1.
The sun is a huge body, yet it appears very small. Why?
Answer:
The sun is very far from us. So in spite of being a huge body, it appears very small.
Question 2.
What are the various uses of solar energy?
Answer:
Uses of Solar Energy:
- Plants need solar energy for making their food. All animals depend on plants for food. Thus, solar energy is essential for growth and maintenance of all living beings on the earth.
- Solar cooker and solar geyser are used for cooking food and for heating water.
- Solar cells produce electricity from solar energy.
Question 3.
Write a brief note on the Earth.
Answer:
This is the third planet from the sun. This is the only planet where life exists. The earth appears blue when seen from space. This is due to the reflection of sunlight form the water and landmass on its surface. Hence, the earth is also called the blue planet.
Question 4.
What do you understand by gaseous planets? Name all the gaseous planets in the solar system.
Answer:
A planet which is mainly composed of gas and ice is called a gaseous planet. Jupiter, Saturn, Uranus and Neptune are the gaseous planets in the solar system.