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A general term for a mass of perennial ice, resting on land or floating shelf-like in the sea adjacent to land is _______
in terms of area extent, which of the following sequences is in order from most to least area covered?
ice sheet, ice cap, ice field
Why, specifically, is glacial ice analogous to a metamorphic rock?
It forms as a result of recyrstallization caused by pressure.
The transformation of snow into glacial ice in Antarctica takes ________ than in midlatitude alpine glacier's because
longer; less snow falls per year in polar regions and longer;less melting and refreezing occurs in Antarctica
The zone where positive gains end and losses begin in the glacial mass balance is called
an equilibrium l ine
Which of the following is true of glacial movement?
The internal flow just below the surface is greater than the basal flow
Which of the following is incorrectly matched?
All of these are correctly matched:
-crevasses--- vertical cracks from friction tension
-ice regelation---- the melting and refreezing of basal ice
-glacial ice---- a metamorphic version of snow and firn
Because the upper regions of a glacier flow ______ than the base of the glacier, the upper part of the glacier tends to be ______.
Unlike a stream-cut valley that assumes a characteristic ______- shape, a glacially-carved valley evidences a characteristic ______-shape
When two valley glaciers join together, they form a ___ at the point at which they merge.
The material deposited behind a terminal moraine forms a(n) _______, whereas that deposits in front of the terminal moraine forms a(n) ______
Till plain; outwash plain
Permafrost develops where soil and rock temperatures are below freezing for at least two years.
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