Carbon exists in the atmosphere mostly as __________ and __________.
A) carbon dioxide, methane
B) calcium carbonate, methane
C) carbon dioxide, calcium carbonate
D) methane, bicarbonate

Question

Quizplus · Accepted Answer

The two most common forms of carbon in the atmosphere are carbon dioxide (CO2) and methane (CH4). Calcium carbonate (CaCO3) and bicarbonate (HCO3-) are not as prevalent in the atmosphere as carbon dioxide and methane.

Carbon Exists in the Atmosphere Mostly as __________ and __________

Carbon Exists in the Atmosphere Mostly as and