NCERT Class 6 Social Science Chapter 13 The Earth in the Solar System

NCERT Class 6 Social Science Chapter 13 The Earth in the Solar System Solutions to each chapter is provided in the list so that you can easily browse through different chapters NCERT Class 6 Social Science Chapter 13 The Earth in the Solar System and select need one. NCERT Class 6 Social Science Chapter 13 The Earth in the Solar System Question Answers Download PDF. NCERT SST Class 6 Solutions.

NCERT Class 6 Social Science Chapter 13 The Earth in the Solar System

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Also, you can read the NCERT book online in these sections Solutions by Expert Teachers as per Central Board of Secondary Education (CBSE) Book guidelines. CBSE Class 6 Social Science Solutions are part of All Subject Solutions. Here we have given NCERT Class 6 Social Science Chapter 13 The Earth in the Solar System, NCERT Class 6 Social Science Textbook of Our Pasts – I: History, The Earth – Our Habitat: Geography, Social and political Life: Civics. for All Chapters, You can practice these here.

The Earth in the Solar System

Chapter: 13

THE EARTH – OUR HABITAT [GEOGRAPHY]

NCERT TEXTBOOK QUESTIONS WITH ANSWERS

Q. 1. Answer the following questions briefly:

(a) How does a planet differ from a star?

(b) What is meant by the solar system? 

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

(d) Why is earth called a unique planet? 

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

(f) What is the universe? 

Ans. (a) How does a planet differ from a star?

(b) The sun, eight planets, satellites and other celestial bodies together form the solar system.

(e) There are eight planets in the solar system. 

These are as follows:

(i) Mercury.

(ii) Venus. 

(iii) Earth.

(iv) Mars.

(v) Jupiter. 

(vi) Saturn. 

(vii) Uranus.

(viii) Neptune.

(d) Earth is called a unique planet because it has:

• Conditions favourable to support life.

• It is neither too hot nor too cold.

• It has water and air which are essential for our survival. 

• It has life supporting gasses like oxygen etc.

(e) We see only one side of the moon always because: 

• The moon moves around the sun in 27 days. It takes the same time to complete one spin because of this only one side of the moon is visible to us. 

(f) The universe is the vast indefinite space having millions of galaxies.

Q. 2. Tick (✓) the correct answer:

(a) The planet known as the “Earth’s Twin” is:

(i) Jupiter.

(ii) Saturn.

(iii) Venus.

Ans. (iii) Venus.

(b) Which is the third nearest planet to the sun?

(i) Venus.

(ii) Earth.

(iii) Mercury.

Ans. (ii) Earth.

(c) All the planets move around the sun in a _________.

(i) Circular path.

(ii) Rectangular path.

(iii) Elongated path.

Ans. (iii) Elongated path.

(d) The Pole Star indicates the direction of the:

(i) South.

(ii) North.

(iii) East.

Ans. (ii) North.

(e) Asteroids are found between the orbits of:

(i) Saturn and Jupiter.

(ii) Mars and Jupiter.

(iii) The Earth and Mars.

Ans.  (ii) Mars and Jupiter.

Q. 3. Fill in the blanks:

(a) A group of ________forming various patterns is called a _________.

Ans. stars, constellation.

(b) A huge system of stars is called ________.

Ans. galaxy.

(c) _________is the closest celestial bodies to our earth.

Ans. Venus.

(d) ________is the third nearest planet to the sun.

Ans. Earth.

(e) Planets do not have their own _______and _________.

Ans. light, heat.

SOME OTHER IMPORTANT QUESTIONS FOR EXAMINATION

VERY SHORT ANSWER TYPE QUESTIONS

Q. 1. To which galaxy does our solar system belong?

Ans. Our solar system belongs to the Milky Way Galaxy.

Q. 2. Name the inner planets of our solar system.

Ans. The inner planets of our solar system are Mercury, Venus, Earth and Mars.

Q. 3. What is an asteroid?

Ans. Thousands of small bodies which revolve around the sun between the orbits of Mars and Jupiter is called an asteroid.

Q. 4. Who was the first man to walk on the moon and when?

Ans. Neil Armstrong was the first man to walk on the moon on 29 July, 1969.

Q. 5. Name the planets in order of their distance from the sun? 

Ans. The planets in order of their distance from the sun are:

(i) Mercury. 

(ii) Venus. 

(iii) Earth. 

(iv) Mars. 

(v) Jupiter. 

(vi) Saturn.

(vii) Uranus. 

(viii) Neptune.

Q. 6. What are celestial bodies?

Ans. The objects in the sky like the sun, the moon and stars etc., are called celestial bodies.

Q. 7. Name any two dwarf planets?

Ans. Ceres and Pluto are the two dwarf planets.

Q. 8. Name two twin’s planets of the solar system. 

Ans. Earth and Venus are the two Twin’s Planets’ of the solar system.

Q. 9. Name the largest planet in the solar system.

Ans. Jupiter. 

Q. 10. Name the smallest planet.

Ans. Mercury.

Q. 11. What is the path taken by the planets to go around the sun

Ans. Orbit.

Q. 12. Name the planet which has a reddish appearance.

Ans. Mars. 

Q. 13. Which planet is nearest to sun?

Ans, Mercury. 

Q. 14. Which planet is almost identical to earth?

Ans. Venus. 

Q. 15. What is the source of heat and light in the solar system?

Ans. Sun. 

Q. 16. Which is the brightest planet?

Ans. Venus.

Q. 17. Name the planets which have rings around them.

Ans. Jupiter, saturn and Uranus have rings around them.

Q. 18. How long does the moon takes to go around the earth once?

Ans. 27 days and 8 hours.

Q. 19. What are man-made satellites.

Ans. Man-made satellite is an artificial satellite. It is been artificially fixed on the solar system like INSAT, IRS, EDUSAT etc.

SHORT ANSWER TYPE QUESTIONS

Q. 1. Why there is no life on moon?

Ans. There is no life on moon because:

(a) There is no air or water. 

(b) It has no life suppporting gases.

(c) It is very hot and very cold. 

(d) Its atmosphere is not at all suitable.

Q. 2. We do not feel the heat of the countless stars as compared to the sun. Why?

Ans. The countable stars in the night sky are similar to the sun. But we do not feel the heat of these stars as compared to the sun. This is because sun is closer to us but other stars are very far away from us.

Q. 3. Why is earth called a ‘Blue planet’? 

Ans. The two-third surface of the earth is covered with water. When it is seen from the outer space, the earth appears blue due to the presence of water. That is why it is called as ‘Blue Planet’.

Q. 4. What do you understand by Pole Star? 

Ans. During the ancient time, people used to determine direction with the help of Pole Star It is the brightest star in the sky. It remains in the same position. It always points towards the north direction, that is why we call them North Star.

Q. 5. Why do we not feel the tremendous heat of the sun?

Ans. Though sun is made of hot gasses, yet we do not feel the tremendous because, it is 150 million km away from the earth.

Q. 6. How are meteoroids formed?

Ans. Meteoroids are the small pieces of rocks which revolve around the sun. Some of these particles enter the earth’s atmosphere with great velocity. Due to the friction in the air they get heated up and start glowing. Most meteors burn out. Some get completely burn and fall on the earth’s surface, creating a hole or a crater.

Q. 7. What are orbits?

Ans. The orbits are the elliptical path in which all the planets revolve around the sun.

Q. 8. Why is the shape of the earth described as geoid?

Ans. The earth is slightly flattened at the poles. That is why its shape is described as a gooid. Geoid means an earth like shape.

Q. 9. Why we cannot see moon and all those bright tiny objects during the day?

Ans. We cannot see the moon and all those bright tiny objects during the day because the very bright light of the sun does not allow us to see all those bright objects of the night sky.

Q. 10. Explain what a meteorite is? 

Ans. The small pieces of rocks which move around the sun are called meteorites.

LONG ANSWER TYPE QUESTIONS

Q. 1. Why is earth called a “unique planet”?

Ans. Earth is called as the unique planet in the solar system because it is the only planet where life is possible. 

The reasons for this are:

(a) Presence of Oxygen: Oxygen is one of the gases which support the life of the human being. Earth is surround by 21% of oxygen. Another gas was Carbon dioxide. 

(b) Presence of moderate temperature: Earth has a moderate temperature i.e., they are neither too hot nor too cold. Earth’s temperature is very much appropriate for the plants and animals. 

(c) Presence of water: Two thirds of the earth’s surface is covered with water. When seen from the outer space it looks blue in colour. So, it is called as “Blue Planet”.

Q. 2. What do you know about dwarf planets? 

Ans. In August 2006, Pluto was considered as a dwarf planet. In a meeting of the international Astronomical Union, a decision was taken that Pluto may be called a dwarf planet like Ceres.

Q. 3. Distinguish between the Earth and the Moon.

Ans.

Q. 4. How a hollow is formed on the surface of the Earth? 

Ans. Meteoroids are the small pieces of rocks moving around the sun. Sometimes it tends to drop upon the Earth. During this process, the friction is caused with the air. Meteor get heated up and burn. Thus, it causes a flash of light. When they completely get burnt, it falls on the earth and a hollow is created on the surface of the Earth.

Q. 5. Who are astronomers? Name any one ancient astronomers.

Ans. The people who study about the celestial bodies are known as astronomers. Aryabhattya was the famous astronomer of the ancient India.

Q. 6. What is the significance of sun in the solar system?

Ans. Significance of sun can be explained as follows: 

(a) The sun is in the center of the solar system and is made up of extremely hot gasses.

(b) It provides the pulling force that binds the solar system. 

(c) The sun is the ultimate source of heat and light for the solar system.

Q. 7. Define the following terms:

(a) Galaxy.

(b) Constellation.

(c) Satellite.

(d) Geography.

Ans. (a) Galaxy: Huge system of billions of stars and clouds of dust and gasses.

(b) Constellation: Various patterns formed by different groups of stars.

(c) Satellite: Celestial body that moves around the planets in the same way as the planets move around the sun.

(d) Geography: It is made up of 2 Greek words ‘ge’ meaning earth and ‘graphy’ meaning writing.

HIGH ORDER THINKING SKILLS

Q. 1. What are asteroids and how they are formed?

Ans. Thousands of small bodies move around the sun between the orbits of Mars and Jupite These are known as asteroids or planetoids. Many believe that it is the small pieces of the planets which exploded a long time back. Largest asteroids is the Ceres. 

Q. 2. How a flash of light and a hollow is created on the earth? 

Ans. Small pieces of rocks moving around the sun are the meteoroids or shooting stan Sometimes, they came near the earth and drop upon it, due to the friction with the air. They get heated up and burn. Thus, a flash of light get created on the earth and when it completely get burnt, it falls on the earth. Thus, a hollow is created on the surface of the earth.

Q. 3. Write a short note on the Pole Star.

Ans. In the ancient time, people used to determine the direction during the night with the help of stars. A bright star is almost directly above the North Pole. This remains in the same position in the sky. This is called the Pole Star’ or ‘North Star’. This even helps the navigate to determine the North direction, when the compass was not discovered.

Q. 4. How a human made satellite scientifically placed in the orbit?

Ans. A human made satellite or artificial satellite is used together information and communication purpose. It is placed through rocket in the orbit. Some of the Indian satellites are INSAT, IRS etc.

Q. 5. Why does the moon appear very big?

Ans. The moon is the only satellite which is near to the earth than any other satellite. It is 3, 84, 400 km away from the earth. That is why it appears very big. 

VALUE BASED QUESTIONS

Q. 1. Why are we unable to see the moon and other tiny objects during day time? 

Ans. We are unable to see the moon and tiny objects during day time. This is because the bright rays of the sun does not allow us to see all these objects.

Q. 2. Why we feel hot during the day but at night we do not feel so? 

Ans. The sun is made up of very hot geses. During the day time its rays directly reach to the ground. That is why we feel hot during day. Whereas, there are countless stars in the night sky. It is very much similar to the sun. Since, they are very far from us, we do not feel hot during night time. 

Q. 3. How can we prove that the earth is the only planet in the solar system where life is possible?

Ans. The earth is the only planet in the solar system where life is possible. 

Conditions favorable to support life are:

(i) Presence of atmosphere: The atmosphere acts as a blanket to the earth. This blanket prevents us from the harmful ultraviolet rays from the sun, that is made of hot gasses. Earth’s atmosphere has gasses like oxygen, carbon dioxide etc. These are very much necessary for our life. 

(ii) Distance from the sun: The earth is the third planet of the solar system. Its distance is neither too close nor too far. So, the planet is also neither too cold nor too hot.

Q. 4. Why is Venus known as “Earth’s Twin’? 

Ans. The planet Venus is known as “Earth’s Twin” because its shape and size are very much similar to each other i.e., earth. 

Q. 5. Explain the phases of moon.

Ans. Phases of the moon can be explained as follows:

(a) The moon appears as a full disc when we see the whole of the lit up side. This is called full moon or purnima. 

(b) When the part facing us does not receive sunlight, we cannot see the moon. This is known as the new moon or amavasya.

(e) After this, the moon appears as a crescent. 

(d) The crescent grows larger as days pass, till the full moon appears.

OBJECTIVE TYPE QUESTIONS

l. MULTIPLE CHOICE QUESTIONS:

Tick (✓) the correct option:

(a) Which planet is called the brightest planet? 

(i) Earth.

(ii) Venus.

(iii) Mars.

(iv) Jupiter.

Ans. (ii) Venus.

(b) Which is the biggest planet of the solar system?

(i) Jupiter.

(ii) Saturn.

(iii) Uranus.

(iv) Neptune.

Ans. (i) Jupiter.

(e) Which star indicates the north direction?

(i) Sun.

(ii) Pole Star.

(iii) Asteroids.

(iv) None of these.

Ans. (ii) Pole Star.

II. FILL IN THE BLANKS: 

(a) Our Earth is also considered as:

Ans. Blue Planet.

(b) ________do not have their own heat and light.

Ans. Planets.

(c) _________are found between the orbits of Mars and Jupiter.

Ans. Asteroids.