Exam 19: Glacial Systems and Landforms

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The _______________ marks the boundary between the zones of accumulation and ablation on an alpine glacier. (two words)​

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Glaciers flow by _____ when the weight of the overlying ice, firn, and snow causes ice crystals at depth to arrange themselves in parallel layers that glide over each other, much like the spreading of a deck of cards. ​

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Glacial _______________ is the process by which moving ice freezes onto loosened rocks and sediments, incorporating them into the flow.

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A deep, narrow, ocean inlet carved by glacial erosion is termed a(n)_______________. ​

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Glaciers are second only to the ocean in the amount of water they contain. ​

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Describe hanging valleys and explain how they form. ​

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A streamlined hill molded from till is termed a(n)_____. ​

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Between each period of maximum ice advance, known as a glacial period, a warmer time called a(n)_______________ period occurred. ​

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Which type of glacier is the smallest? ​

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In cold climates, regions of permafrost are good places to build on because the ground stays frozen to the surface all year. ​

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What is the difference between a glacier's zone of accumulation and zone of ablation? ​

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Sediment deposited by glacial meltwater is _____. ​

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What is the relationship between firn and glacial ice? ​

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As an ice sheet recedes and its weight on the land is removed, the land surface sinks downward by the process of isostatic rebound. ​

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The zone of ablation is _____. ​

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Glacial abrasion leaves _______________-linear scratches, grooves, and gouges-where sharp-edged rocks scrape across bedrock. ​

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During the last major glacial expansion, sea level was higher than it is today. ​

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Lakes that form in cirques are known as cols. ​

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Glacial ice flows from the zone of accumulation into the zone of ablation. ​

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Which of these glacial landforms are commonly associated with lakes? ​

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