define atmosphere and state its composition
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The atmosphere is a mixture of different types of gases.
Nitrogen and oxygen are the two main gases in the atmosphere and 99 percentage of the atmosphere is made up of these two gases. Other gases like argon, carbon dioxide, neon, helium, hydrogen, etc. form the remaining part of the atmosphere.
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Atmosphere is the cover of air on the Earth.
It is made up of 78% nitrogen, 21% oxygen and 1% of other gases.
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