Exam 13: Glaciers and Glaciation

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When snow thaws and refreezes,which results in a loss of air and pore spaces,the result is ____________________.

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A glacier begins to flow when the ice reaches a critical thickness of about:

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In general,rates of glacial flow are greatest in the zone of ____________________.

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How do continental glaciers differ from valley glaciers?

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The ice ages are caused by:

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Why is the velocity of valley glaciers slower along valley walls than in the center of the glacier?

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How does a terminal moraine differ from a recessional moraine?

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What does the term glaciation mean?

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The reason that Earth is now closest to the Sun in January,but will be closest in July in 11,000 years,is:

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The only continent that does not presently have glaciers is:

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What is glacial drift,and how does it differ from glacial till?

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The Matterhorn in Switzerland is a glacial ____________________ landform known as a(n)____________________.

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Any sediment deposited as a result of glacial activity is known as glacial ____________________.

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What is a hanging valley,and how does one form?

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The largest existing glacier is located in:

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The fact that the Earth's orbit around the sun changes over time is called ____________________.

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What are eskers,and how do they form?

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Glaciers move primarily by ____________________ flow.

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Earth's orbit varies from nearly a circle to an ellipse and back again in about:

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What is a fiord,and how does one form?

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