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Finger [1]
3 years ago
6

How do the oxygen (O2) and carbon dioxide (CO2) levels change over time?

Biology
1 answer:
Xelga [282]3 years ago
8 0

Answer:

Over a vast amount of time, millions of years, the earth gradually cooled. When the temperature dropped enough, water vapor condensed and went from a gas to liquid form. This created clouds. From these clouds, the oceans formed and the oceans absorbed a lot of the carbon dioxide in the atmosphere.

Explanation:

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