Question

what is earth??????????????????​

Answer 1

Answer:

1. Earth-It is the only planet where life exists .
2. It have 21% of oxygen.
3. It looks blue-green from space.

Answer 2

Earth:-

Earth is the only planet which is known to possess life on it.It is the 3rd planet from the sun and the fifth largest planet in the solar system.It was formed about 4.5 billion years ago.

Earth's surface:

• 29% - land consisting of continents and islands.

• 71% -  covered with water i.e., by oceans but also by lakes, rivers and other fresh water,

• Earth's polar regions are covered in ice.

→Earth is smaller than Jupiter, Saturn, Uranus and Neptune.

→And larger than Mercury, Mars and Venus.

→The diameter of earth is 8000miles i.e, 13000 kilometers.

Earth's atmosphere:

• 78 %nitrogen

• 21 % oxygen

• Some trace amounts of water, argon, carbon dioxide and other gases.

→About 7 billion people live on earth.

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