chapter14 study guide

chapter14 study guide - GLG111 Study Guide Spring 2009...

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GLG111 Study Guide Spring 2009 Chapter 14: Shorelines, Glaciers, and Changing Sea level, p. 416-433 Define the following terms: Glacier: large masses of ice on land that move under their own weight Valley glacier: glacier that forms in the cold heights of mountain ranges where snow accumulates, usually in pre-existing valleys, and flows down the valley Continental glacier: slow moving, thick sheet of ice that covers large part of a continent (Greenland/Antarctica) Ablation: total amount of ice that a glacier loses each year Accumulation: total amount of snow added to the glacier each year Plastic flow: total of all the small movements of the ice crystals that make up a glacier, resulting in a large movement of the whole mass of ice (polar glaciers) Basal slip: at base of glacier, ice is under pressure from the weight of the ice, freezing point of water decreases, ice at the base melts, glaciers slide over the ground on layer of water (sub-polar glaciers/continental glaciers) Pleistocene: a division of the Quaternary Period. Began 1.8 million years ago and ended 10,000 years ago. Last Great Ice Age. 30% land surface under ice
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chapter14 study guide - GLG111 Study Guide Spring 2009...

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