Term
| glaciers located in the mountains that occupy former river valleys are... |
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Definition
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Term
| the most rapid flow in a glacier is... |
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Definition
| near the midline of the glacier, toward the top |
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Term
| which of the following landforms is produced through erosion by alpine glaciers? |
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Definition
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Term
| at the present time, ice sheets are located... |
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Definition
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Term
| the maximum ice advance of the Wisconsinan Glaciation which covered much of North America and Europe was... |
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Definition
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Term
| an unsorted mixture of rock fragments ranging in size from clay to boulders is called... |
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Definition
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Term
| the _____ is made up of glacial till that accumulates at the furthest extent of the ice edge. |
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Definition
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Term
| _______ are smoothly rounded oval hills that occur in swarms behind the terminal moraine. |
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Definition
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Term
| the most recent episode of glacial advance was... |
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Definition
| (none of the above) Wisconsinan Stage |
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Term
| during the Wisconsinan Glaciation, ice caps and ice sheets were found on all of the following continents except... |
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Definition
| Africa (and South America) |
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Term
| the granular compacted old snow that forms glacial ice is properly referred to as... |
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Definition
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Term
| sharp, often jagged ridges that rise above ice-containing troughs and that separate adjacent glaciers or glacial valleys are called... |
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Definition
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Term
| what is the name given to lakes that form in hollows left behind by prior alpine glaciers? |
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Definition
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Term
| what is the name commonly given to the most recent glaciation in North America? |
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Definition
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Term
| a glacial delta composed of well-washed and well-sorted sand and gravels forms which of the following land forms? |
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Definition
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Term
true/false
glacial ice accumulates when ablation exceeds accumulation |
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Definition
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Term
true/false
when a glacier surges it can travel down valley at speeds of 60 meters per day for several months |
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Definition
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Term
true/false
an iceberg is formed by the direct freezing of ocean water |
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Definition
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Term
true/false
scientists have proven that the Ice Age was caused by a decrease in the Sun's energy output over the past several million years |
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Definition
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Term
true/false
the effects of glaciation on agriculture are largely negative |
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Definition
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Term
true/false
at high elevations, orographic precipitation encourages the growth of glacial ice |
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Definition
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Term
true/false
a rock knob is shaped by moving ice, such that the lee side is eroded by glacial abrasion to create a smooth surface |
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Definition
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Term
true/false
the uppermost layer of a glacier is brittle, but beneath the ice behaves as a plastic substance and moves by slow flowage |
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Definition
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Term
true/false
motion in an alpine glacier is fastest near the bed and slowest on the surface at its midline |
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Definition
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Term
true/false
pack ice is a form of sea ice that forms from the freezing of sea water and completely covers the sea surface |
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Definition
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Term
true/false
lobes of ice flowing from the Laurentide ice sheet spread around an area in Wisconsin known as the Driftless Area |
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Definition
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Term
true/false
ice sheets during the last glaciation in north america extended as far as Florida and Texas |
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Definition
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Term
true/false
stratified drift consists of layers of sorted and stratified clays and angular pebbles and large boulders |
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Definition
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Term
true/false
streams of meltwater from the terminus of a glacier build glacial deltas that eventually become flat-topped land forms known as kames |
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Definition
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Term
true/false
the astronomical hypothesis proposed by Milankovitch suggests that cycles in axial rotation and solar revolution has a period of around 20,000 years |
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Definition
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