Class 5 Science Chapter 11 Our Solar System Solutions

CHAPTER - 11

Our Solar System

EXERCISE

(Question/Answer)

Highlights

(i) Fill in the blanks.

(ii) Match the following

(iii) Tick the correct option

(iv) Answer the following questions in brief.

(v) Answer the following questions.

Fill in the blanks

( Exercise )

1. The earth is sometimes known as the ___________ planet.

2. The earth completes one rotation about its axis in ___________ hours.

3. The main members of the solar system are the sun and ___________ planets.

4. The sun is a huge source of _ and _.

5. Day and night occur on earth due to its ___________ about its own axis.

Answer

(1) blue

(2) 24

(3) eight

(4) heat, light

(5) rotation.

B. Match the following:

( Exercise )

Answer: (1) e, (2) c, (3) d, (4) b, (5) a.

Tick the correct option.

( Exercise )

1. The number of planets, in our solar system, is-

2. The planet, which reflects large amount of sunlight falling on it, is-

3. The planet Uranus is also known as a-
4. The correct statement, about the atmosphere of the planet named in it, is-
5. The fourth and the sixth planets, of the solar system, are, respectively-
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-

7. The first Indian satellite is-

Answer

(i) eight

(ii) Venus

(iii) Jovian planet

(iv) Venus has mostly carbon dioxide around it.

(v) Mars and Saturn

(vi) Answer: A and C

(vii) Answer: Aryabhatta

Answer the following questions in brief.

( Exercise )

1. Name the hottest planet in our solar system. Is it closest to the Sun?

Answer: Venus, no it is not closest to the sun.

2. How much time does the earth take to-

(i) revolve once around the sun?
Answer: nearly 365 days
............................................................. (ii) to complete one rotation about its own axis?
Answer: 24 hours
.............................................................

3. State the nature of the shape of orbit of planets.

Answer: According to Kepler, the orbit of a planet is elliptical in shape.

4. Write the meaning of the term ‘Artificial Satellites’.

Answer: Artificial Satellites are man-made objects, which can be made to revolve around the earth.

Answer the following questions.

( Exercise )

1. How is the sun useful to us?

Answer: Sun is the main source of energy which is essential for growth and maintenance of all forms of life on the earth. Plants make their food in the presence of sunlight. All other animals get their food directly or indirectly, from plants. We use solar energy in many devices such as solar cooker, solar geysers and solar cells.

2. Name the terrestrial planets. Why are they so called?

Answer: Mercury, Venus, Earth and Mars are terrestrial planets. These planets are mostly made up of rocks and metals and hence called terrestrial planets.

3. State the conditions necessary for existence of life on a planet.

Answer: Conditions necessary for existence of life on a planet are-

Presence of atmosphere.
Presence of liquid water on the surface.
Right size and right distance from the sun that enables it to receive just the correct amount of solar energy.

4. Why do we observe phases of moon?

Answer: We observe phases of moon because of the changes in the relative position of the earth and the moon, with respect to sun.

5. State two uses to which artificial satellites are being put.

Answer: Two uses of artificial satellites are-

They are used in communication for transmitting radio, telephone and television signals.
They are also used for weather forecasting and remote sensing.

CHAPTER - 11

Our Solar System

EXERCISE

(Question/Answer)

Highlights

(i) Fill in the blanks.

(ii) Match the following

(iii) Tick the correct option

(iv) Answer the following questions in brief.

(v) Answer the following questions.

Fill in the blanks

( Exercise )

1. The earth is sometimes known as the ___________ planet.

2. The earth completes one rotation about its axis in ___________ hours.

3. The main members of the solar system are the sun and ___________ planets.

4. The sun is a huge source of ___________ and ___________.

5. Day and night occur on earth due to its ___________ about its own axis.

Answer

B. Match the following:

( Exercise )

Tick the correct option.

( Exercise )

1. The number of planets, in our solar system, is-

2. The planet, which reflects large amount of sunlight falling on it, is-

Answer

Answer the following questions in brief.

( Exercise )

1. Name the hottest planet in our solar system. Is it closest to the Sun?

2. How much time does the earth take to- (i) revolve once around the sun? Answer: nearly 365 days ............................................................. (ii) to complete one rotation about its own axis? Answer: 24 hours .............................................................

3. State the nature of the shape of orbit of planets.

4. Write the meaning of the term ‘Artificial Satellites’.

Answer the following questions.

( Exercise )

1. How is the sun useful to us?

2. Name the terrestrial planets. Why are they so called?

3. State the conditions necessary for existence of life on a planet.

4. Why do we observe phases of moon?

5. State two uses to which artificial satellites are being put.

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4. The sun is a huge source of _ and _.

2. How much time does the earth take to-

(i) revolve once around the sun?
Answer: nearly 365 days
............................................................. (ii) to complete one rotation about its own axis?
Answer: 24 hours
.............................................................