Question

plz help me to understand​

Answer 1

Atmosphere is the blanket of different gases which surrounds the Earth. Earth's atmosphere contains 78% of nitrogen, 21% oxygen, 0.9% argon, and 0.03% carbon dioxide and very small percentages of other elements.

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Answer 2

The atmosphere of the Earth is the layer of gases, commonly known as air, that surrou ds the planet Earth and is retained by Earth's gravity.. .By volume, dry air contains 78.09% nitrogen,20.95% oxygen,and 0.04% carbon dioxide and small amount of other gases.