In the paleoatmosphere, the primary gases were _____. oxygen, carbon dioxide, nitrogen carbon dioxide, nitrogen, and water vapor oxygen and water vapor carbon dioxide and oxygen

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The paleoatmosphere refers to the Earth’s atmosphere in the geological past. The paleoatmosphere was dominated by nitrogen, carbon dioxide and methane. These gases are generated by the radioactive decay of Potassium. During this pre-biological atmosphere, it is thought to have been reducing, to have highly contained virtually no free oxygen, and virtually no argon. Therefore the major gases on this period are the Nitrogen and Carbon Dioxide.


In the paleoatmosphere, the primary gases were carbon dioxide, nitrogen, and water vapor. 

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