Most rocks on the Earth contain what type of material?

a. Organic chemicals
b. Melts
c. Quartz
d. Silica

Ans: d. Silica

Environmental & Atmospheric Sciences

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The average elevation of the exposed land is

A) 875 m (2870 ft.). B) -2070 m (-6790 ft.). C) 100 m (325 ft.). D) -3800 m (-12,470 ft.).

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Which species has the highest probability of becoming extinct due to climate change?

A. polar bear B. whitetail deer C. gray squirrel D. coyote

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Guyots are often formed near spreading centers

Indicate whether the statement is true or false

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Engineering problems in permafrost areas include:

a. frost heave b. permafrost thaw c. slope stability d. all of the above

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