Scientists study ancient atmospheric carbon dioxide levels preserved in __________.

Question

Quizplus · Accepted Answer

Ice cores provide the most direct record of atmospheric carbon dioxide levels. As snow falls and is compressed into ice, it traps bubbles of air that contain samples of the atmosphere from the time the snow originally fell. Therefore, scientists can analyze the bubbles in ice cores to determine the levels of carbon dioxide in the atmosphere at that time. Marine sediments, tree rings, and corals cannot provide as direct a record of atmospheric carbon dioxide levels.

Scientists Study Ancient Atmospheric Carbon Dioxide Levels Preserved in __________