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Which Isotope Ratio Is Especially Important in Studying Earth's Climate

Question 45

Multiple Choice

Which isotope ratio is especially important in studying Earth's climate over the past 500,000 years?

A) oxygen-18 to oxygen-16
B) carbon-14 to carbon-12
C) sulfur-34 to sulfur-32
D) nitrogen-15 to nitrogen-14
E) argon-40 to argon-39

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