Oxygen-18 and Oxygen-16 Are Useful in Studying Past Climates Because

question 28

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

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