Glaciers (Grades 11-12)
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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.
The cracks of the brittle upper layers of a glacier are called
How does an alpine glacier modify the valley through which it moves?
- deepens it
- straightens it
- widens it
- all of these answers
An end moraine that forms when a glacier is at its greatest advance, before beginning to retreat is called a
- lateral moraine.
- medial moraine.
- recessional moraine.
- terminal moraine.
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
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
- in clusters and indicates the direction a glacier is flowing
Which of the following is NOT an example of a landform created by glacial erosion?
- end moraine
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
Sediment deposited directly by glacial ice is called
- unsorted till.
- sorted glacial drift.
- stratified drift.
- rock flour.
Which one of these is NOT associated with glacial erosion?
- glacial striation