Question

2. Define one atmosphere.
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Answer 1

The mixture of gases that surrounds the earth is called atmosphere.

this is the answer of this question.

Answer 2

Answer:

Atmosphere refers to the gases surrounding a star or planetary body held in black by gravity . The composition of the earth's atmosphere is about 78 percent nitrogen,21 percent oxygen, 0.9 percent Argon , with water vapour, carbon dioxide and other gases.

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