Like Mars and Venus, Earth originally had a significant amount of carbon dioxide in its atmosphere.Where is the majority of the carbon now?
A) It has escaped into outer space.
B) It is bound up in the plant life on Earth.
C) It is bound up in rocks.
D) It is dissolved into the oceans.
E) It is still in the atmosphere in the form of complex molecules.

Question

Quizplus · Accepted Answer

The majority of Earth's carbon dioxide is now bound up in rocks, particularly in the form of carbonate minerals like limestone.

Like Mars and Venus, Earth Originally Had a Significant Amount