Wandreybuer Wandreybuer

11-11-2015
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Why is Earth's current atmosphere made up mostly of nitrogen and oxygen?
A. Earth is eroding.
B. Earth is warming up.
C. Earth is continuing to cool.
D. Earth has living things on the surface.

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janethtopete16 janethtopete16

11-11-2015

The correct answer is D

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