Question

How much of Earth's atmosphere is made How much of Earth's atmosphere is made up of nitrogen and oxygen?

Answer 1

Hello!

ANSWER

$\boxed{ \bf d.~Close~to~99~percent.}$ of the Earth's atmosphere is made up of nitrogen and oxygen.

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Oxygen makes up about 21% of Earth's atmosphere, and nitrogen makes up about 78%. Together, the two make up approximately 99% of the atmosphere.

Answer 2

How much of Earth's atmosphere is made up of nitrogen and oxygen?

  A. Close to 99 percent

Hope I was helpful (: