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प्रश्न
How did the Earth form?
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उत्तर
- Approximately 4.54 billion years ago, Solar System was a cloud of dust and gas known as Solar Nebula.
- Due to an explosion, these particles collapsed and began to spin having the sun at centre.
- The bigger particles which revolve around the sun are called planets. Thus the planet Earth formed.
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संबंधित प्रश्न
Why is the earth called a watery planet?
Short Answer Question:
How did the earth get its atmospheric blanket?
Study the picture and answer the questions that follow.
(a) What is meant by the Solar System?
(b) Give two differences between a planet and a star.
(c) Name the planets known as terrestrial planets.
(d) Give two advantages the earth has over other planets.
(e) What are satellites?
Which planet is known as the ‘red planet’?
Which planet has only one satellite?
Which planet has three rings around it?
How many satellites are there in Solar System?
What is the period of rotation of Moon?
Draw a fully labelled diagram of the water cycle and explain its working and significance with reference to the diagram.
Distinguish between the following pair.
Meteors and Meteorites
How many satellites are there in the Solar System?
Name the following:
Two planets which are nearer to the sun than the Earth.
Give reasons for the following:
Mercury completes its orbit in less time than the Earth.
Why is Neptune the coldest planet of the Solar System?
Which is the satellite of the Earth?
Use your brain power!
Suppose you want to give your address to a friend you have on the planet Mars. How will you write your address if you want them to understand exactly where you live?
For what purpose are rockets used in space travel?
How many continents are there on the earth?
Which are the biggest and smallest continents on our earth?
______ is called Earth’s twin.
