Where on the Earth are carbon dioxide levels "recorded" throughout history?
A)In ocean waters
B)In fresh water bodies
C)In ice cores
D)In precipitation

Question

Quizplus · Accepted Answer

Ice cores are used to record past carbon dioxide levels. Scientists drill into ice sheets and glaciers to extract cores that contain trapped air bubbles. These bubbles serve as a historical archive, revealing the composition of the Earth's atmosphere, including carbon dioxide levels, over hundreds of thousands of years.

Where on the Earth Are Carbon Dioxide Levels "Recorded" Throughout