The Earth in the Solar System-Exercise Question Answer-Class-6 Social Science
NCERT Exercise Question Answers
- Answer the following questions briefly:
a) How does a planet differ from a star?
Answer:
| Planet | Star |
| Planets do not have their own light. | Stars have their own light |
| They revolve around a star in predetermined orbit. | Stars do not revolve around other celestial bodies. |
| Planet do not twinkle | Stars Twinkle. |
| Planets are smaller in size. | Stars are larger in size. |
b) What is meant by the ‘Solar System’?
Answer: The solar system includes the sun, eight planets, satellites, and a small number of other celestial entities. It is also referred to as the family of the sun because all these celestial objects are central around the sun.
c) Name the planets according to their distance from the sun.
Answer: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and naptune.
d) Why is the Earth called a unique planet?
Answer: The Earth is called the unique planet because:
1. The earth is the 3rd planet from the sun and is the only planet that favours the conditions in which life can be possible.
2. It has oxygen, it has trees, the climate here is suitable for living.
3. Water is even found in multiple forms in this planet.
d) Why do we see only one side of the moon always?
Answer: The moon takes about 27 days to complete one rotation on its axis, which is the same amount of time it takes to orbit around the Earth. Therefore, we see only one side of the moon always.
e) What is the Universe?
Answer: A collection of billionsof galaxies is commonly referred to as the universe.
2. Tick the correct answer.
a) The planet is known asthe “Earth’s Twin” is..
i) jupiter
ii) Saturn
iii) Venus
b) Which is the third nearest planet to the sun?
i) Venus
ii) Earth
iii) Mercury
c) All the planets move around the sun in a…..
i) Circular path
ii) Rectangular path
iii) Elongated path
d) The pole Star indicates the direction to the…
i) South
ii) North
iii) East
e) Asteroids are found between the orbit of…
i) Saturn and Jupiter
ii) Mars and Jupiter
iii) The Earth and mars
Answer: a-iii, b- ii, c- iii, d- ii, e- ii
3. Fill in the blanks:
a. a group of ……….forming various pattern is called a………
b. A huge system of stars is called………………………
c. ………………..is the closest celestial body to our Earth.
d. …………..is the third nearest planet to the sun.
e. planets do not have their own ……….and………..
Answer:
a. stars, constellation
b. galaxy
c. Moon
d. Earth
e. heat, light
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