CBSE Class 6 Social Science The Earth In The Solar System Notes

CBSE Class 6 Social Science - The Earth in the Solar System Learning the important concepts is very important for every student to get better marks in examinations. The concepts should be clear which will help in faster learning. The attached concepts made as per NCERT and CBSE pattern will help the student to understand the chapter and score better marks in the examinations. 

Q1. Answer the following questions briefly:

a) How does a planet differ from star?

Answer:  i) Stars emit their own heat and light while planets do not have their own light.

ii) There are millions of stars while we have only eight planets in the solar system.

b) What is meant by the ‘solar system’?

Answer: The sun, eight planets, satellites and some other celestial bodies known as asteroids and meteoroids form the solar system. The sun is in the centre of the solar system. All the planets of the solar system move around the sun in fixed paths.

c) Name all the planets according to their distance from the sun.

Answer: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune.

d) Why Earth is called a unique planet?

Answer: Earth is called a unique planet because of the following reasons:

1. The land, air, water, favorable climatic facilities and the origin of life is possible on earth.

2. The earth is neither too hot nor too cold.

3. The earth has life supporting gases like oxygen.

4. No other planet of the solar system has life like that of earth.

e) Why do we see only one side of the moon always?

Answer:The moon moves around the earth in about 27 days. It takes exactly the same time to complete one spin. As a result only one side of the moon is visible to us on the earth.

f) Define universe?

Answer Universe is a cluster of galaxies. It is vast and ever expanding.

Q2. Fill in the blanks:

1. The planet known as the ‘earth’s twin’ is Venus.

2. Third nearest planet to sun is Earth.

3. The pole star indicates the direction to the North.

4. Asteroids are found between the orbits of Mars and Jupiter.

5. A group of stars forming various patterns is called as constellation.

6. A huge system of stars is called as galaxy.

7. The moon is the closest celestial body to our earth.

8. Planets do not have their own heat and light.

9. The stars are not visible during the day because of sun’s brightness.

10. The moon is a natural satellite.

Q3. Name the nearest star to the earth.

Answer The nearest star to the earth is the Sun.

Q4. Name the second nearest star to the earth after sun.

Answer Proxima Centuari is the second nearest star to the earth.

Q5. Why earth is called a ‘blue planet’?

Answer Earth is called a blue planet because two third of earth’s surface is covered with water.

Q6. How much time does it take for the light of the sun to reach earth?

Answer It takes about 8 minutes for the light of the sun to reach earth.

Q7. Name the first person who stepped on the surface of the moon?

Answer Neil Armstrong was the first person who stepped on the surface of the moon.

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