Glaciers (Grades 11-12)
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Glaciers
1.
A glacier will retreat if
- more ice accumulates than melts.
- it gains ice at the same rate that ice melts.
- more ice melts than accumulates.
- the ice melts slower than it accumulates.
2.
What are the cracks of the brittle upper layers of a glacier called?
- crevasses
- calves
- aretes
- horns
3.
How does an alpine glacier modify the valley through which it moves?
- deepens it
- straightens it
- widens it
- all of these answers
4.
An end moraine that forms when a glacier is at its greatest advance, before beginning to retreat is called a moraine.
- lateral
- medial
- recessional
- terminal
5.
The lower part of the glacier, where more snow melts in the summer and accumulates in winter, is called the
- snow line.
- zone of accumulation.
- ice sheet.
- zone of ablation.
6.
Glacial till is
- first carried by a glacier then deposited by a stream.
- sediment carried by the top part of the glacier.
- deposited directly from glaciers and has sediment of a variety of sizes all mixed together.
- found evenly distributed across Earth's landmasses.
7.
Which of the following is NOT an example of a landform created by glacial erosion?
- horn
- aretes
- cirque
- end moraine
8.
About how long ago did the most recent glacial advance begin?
- 10,000 years ago
- 100,000 years ago
- 18,000 years ago
- 8.5 million years ago
9.
Sediment deposited directly by glacial ice is called
- unsorted till.
- sorted glacial drift.
- stratified drift.
- rock flour.
10.
Which one of these is NOT associated with glacial erosion?
- glacial striation
- ablation
- plucking
- abrasion
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