Question

B.
2. What are the two main constituents of the earth's atmosphe​

Answer 1

Answer:

Nitrogen and Oxygen

Explanation:

Nitrogen constitutes 78% of atmospheric air.

Oxygen constitutes 21% of atmospheric air.

And other gases like argon , Carbon dioxide etc. constitute 0.9% of atmospheric air.

It totally forms 99.09% .

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Answer 2

Answer:

Nitrogen — 78 percent.

Oxygen — 21 percent.

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