The formation of limestone from carbon dioxide is part of what cycle?

Question

a. rock cycle

b. hydrologic cycle

c. carbon cycle

d. a and c

Answer 1

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I think the answer your teacher is looking for is D however carbon dioxide is not directly precipitated to form limestone. Carbon dioxide has to form a carbonate "CO3" with Calcium to form limestone( CaCO3) which gets incorporated into shells, corals, and limey mud which eventually form limestone proper. CO2 dissolved in water forms the weak acid carbolic acid which is the weathering agent that dissolves limestone to form caverns. So it is a component of the rock cycle but not in the way the question seems to suggest.

Answer 2

Carbon cycle. and rock cycle. D.