At any time in Earth's history when the rate of carbon burial increases on continents or beneath the sea, both carbon dioxide in the atmosphere and carbon dioxide dissolved in the ocean become enriched in
A) carbon 14.
B) carbon 13.
C) carbon 12.
D) all isotopes of carbon.
Correct Answer:
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Q1: Carbon dioxide is needed to weather away
Q3: In discussing stable isotopes, which are
Q4: Deep marine carbon dioxide is returned to
Q5: Reservoirs expand and contract because of changes
Q6: Some dead plant material escapes from the
Q7: The most important greenhouse gas is
A) phosphorus.
B)
Q8: A plant requires only _ to build
Q9: _ is a by-product of photosynthesis.
A) Water
B)
Q10: Isotopically light carbon that _ preferentially extract
Q11: Photosynthesis requires two things, and they are
A)
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