Question
How did the four layers of the atmosphere come into existence ?

Answer

The carth was in the form of a gaseous fireball initially.
  • The fireball slowly cooled down and some of its matter was transformed into liquid and solid state.
  • During this process, the matter which condensed into solid material, created the 'Lithosphere'.
  • The matter which transformed into liquid form created "Hydrosphere and the matter which condensed into gaseous form is called 'Atmosphere.
  • The life which developed into the lithosphere, the hydrosphere and the atmosphere is called 'Biosphere'. This way, the four layers of the atmosphere came into existence.

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