How does a geologist distinguish between glacial deposits and regular sediment deposited in rivers or lakes?
A. glacial deposits have minerals usually lost to physical weathering during normal sedimentary processes
B. glacial deposits consist primarily of mechanically weathered rock debris only
C. glacial deposits consist primarily of well-sorted, rounded grains of quartz and clay
D. glacial deposits have minerals usually lost to chemical weathering during normal sedimentary processes
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Which of the following best describes why glaciers form?
A. Glaciers form anywhere where there is direct sunlight and warm annual temperatures.
B. Glaciers form anywhere where there is a winter season.
C. Glaciers form anywhere where there is significant indirect sunlight or cold annual temperatures.
D. Glaciers form anywhere where there is no significant indirect sunlight or warm annual temperatures.
The Earth is still in an Ice Age today because there are still glaciers on the planet.
Most glaciers today are in a state of retreat.
Glaciers form in areas where more snow falls in the winter than is lost in the summer.
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