The Antarctic Ice-Core Plot of Carbon Dioxide (Ppm) Shows Peaks

question 45

Multiple Choice

The Antarctic ice-core plot of carbon dioxide (ppm) shows peaks and valleys at about the same times as the temperature plot has peaks and valleys, over 400,000 years. What can we conclude based on this fact alone?

• A) Higher carbon dioxide concentrations cause higher global average temperatures.
• B) The carbon dioxide concentration is inversely related to the global average temperature.
• C) Higher global average temperatures cause higher global carbon dioxide concentrations.
• D) There is a correlation between the carbon dioxide concentration and the average temperature.

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Definitions:

Terminal Moraine

A terminal moraine is an accumulation of debris and sediment formed at the snout (end point) of a glacier, marking the furthest advance of the glacier.

Cirque

A mountain basin with steep sides and a bowl-like shape, formed by glacier activity, frequently hosting a small lake.

Moraine

A mass of rocks and sediment carried down and deposited by a glacier, typically as ridges at its edges or extremity.

Valley

A low area between hills or mountains, often with a river or stream flowing through it.