1. How does a planet differ from a star?
Ans. Planet- 1. Some celestial bodies do not have their own heat and light.
2. They are lit by the light of the stars.
3. Such celestial bodies are called planets. for example Earth Mercury etc.
Star- 1. Some celestial bodies are made up of gases.
2. They have their own heat and light.
3. The celestial bodies are known as Stars. for example sun.
2. What is meant by the solar system?
Ans. The sun, eight planets, satellites and some other celestial bodies known as asteroids and meteoroids form the solar system.
4.Why is earth called a unique planet?
Ans. Conditions favourable to support life are probably found only on the earth. This is the reason why Earth is called a unique planet.
5. Why do we see only one side of the Moon always?
Ans. 1. The moon moves around the earth in about 27 days.
2. It takes exactly the same time to complete one spin.
3. As a result, only one side of the moon is visible to us on the earth.
6. What is the universe?
Ans. The universe is made up of millions of galaxies,which in turn are made up of huge system of billions of stars.
Q3. Name all the planets according to their distance from the sun.
Make the diagram of solar system on page number 3 and note down the names of the planets in the correct sequence.
Ans. Planet- 1. Some celestial bodies do not have their own heat and light.
2. They are lit by the light of the stars.
3. Such celestial bodies are called planets. for example Earth Mercury etc.
Star- 1. Some celestial bodies are made up of gases.
2. They have their own heat and light.
3. The celestial bodies are known as Stars. for example sun.
2. What is meant by the solar system?
Ans. The sun, eight planets, satellites and some other celestial bodies known as asteroids and meteoroids form the solar system.
4.Why is earth called a unique planet?
Ans. Conditions favourable to support life are probably found only on the earth. This is the reason why Earth is called a unique planet.
5. Why do we see only one side of the Moon always?
Ans. 1. The moon moves around the earth in about 27 days.
2. It takes exactly the same time to complete one spin.
3. As a result, only one side of the moon is visible to us on the earth.
6. What is the universe?
Ans. The universe is made up of millions of galaxies,which in turn are made up of huge system of billions of stars.
Q3. Name all the planets according to their distance from the sun.
Make the diagram of solar system on page number 3 and note down the names of the planets in the correct sequence.
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