Multiple Choice
Oxygen-18 and oxygen-16 are useful in studying past climates because ________.
A) ozone formation and decay depend on the ratio of oxygen-18 to oxygen-16
B) both water and calcite contain oxygen
C) oxygen ratios are directly related to carbon dioxide (CO₂) levels
D) more oxygen-18 is stored in glacial ice when temperatures drop
Correct Answer:
Verified
Correct Answer:
Verified
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