Why is earth's current atmosphere made up mostly of nitrogen and oxygen?
a. earth is eroding....
Social Studies, 05.11.2019 18:31 kingo7
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.
Answers: 2
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