Why do atmospheric carbon dioxide concentrations fluctuate seasonally?

A. changes in plant growth
B. changes in human activity
C. changes in temperature
D. changes in precipitation


Answer: A

Environmental & Atmospheric Sciences

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Answer the following statement true (T) or false (F)

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The intrusive (coarse grained) igneous rock diorite has the same chemical composition and mineralogy as the extrusive (fine grained) igneous rock:

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