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Define the Earth Planet? Or, What do You Know About the Earth Planet?
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Earth : This is the third planet of our solar system and the only planet where life exists. The major factors responsible for supporting life on earth are ;

  1. The temperature of the earth is is optimum for the existence of lives.
  2. The presence of life gases and water on the surface of earth helps the life to flourish.
  3. Earth also has a protective layer of ozone, which protects harmful ultraviolet radiation coming from the sun to reach surface.
  • The atmosphere of earth consists of mainly Nitrogen (78%), Oxygen (21%), Carbon dioxide (0.3%) and remaining are the mixture of other gases.
  • It takes almost 24 hours to complete one rotation around its own axis, and 365 days and 6 hour to complete one revolution around the Sun.
  • Certain consequences, sach as causing of days and nights is due to rotation of earth on its own axis.
  • The change of season is due to the revolution of earth around the Sun.
  • Earth has one natural satellites called Moon.

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