Poorly sorted, unconsolidated Earth material that includes at least 20 percent gravel is called:
a. rock.
b. mud.
c. talus.
d. debris.
e. soil.
D
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Which of the following is not a characteristic of an actively erupting volcano?
A) Totally covered in a fresh blanket of clean, white snow B) Billowing ash column rising into the sky C) Glowing lava flows moving down mountain slopes D) Rapidly melting glaciers/snowpack producing massive mudflows
Which of the following is used to describe the half of the Earth that lies north of the Equator?
Southern Hemisphere. Northern Hemisphere. Western Hemisphere. Eastern Hemisphere.
The annual global growth rate of the human population peaked at 2.1% in the ________ and has been declining ever since
A) early 1900s B) 1950s C) 1960s D) 1990s E) year 2000
Of the following, the best example of a product of mass wasting is ________
A) exfoliation domes B) sandstone monoliths C) faults D) scree E) limestone