Why Does Earth Have So Little Carbon Dioxide in Its

question 144

Multiple Choice

Why does Earth have so little carbon dioxide in its atmosphere compared to Venus?

• A)Earth has just as much carbon dioxide as Venus,but most of it is locked up in carbonate rocks rather than being free in the atmosphere.
• B)Earth's volcanoes outgassed far less carbon dioxide than those on Venus.
• C)Earth once had a lot of carbon dioxide,but it was lost to space during the heavy bombardment early in our solar system's history.
• D)Chemical reactions turned Earth's carbon dioxide into nitrogen.

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