What is the sinking of continents due to the weight of continental ice?
A. pluvial development
B. moraining
C. the periglacial zone
D. crustal depression
E. loess
D
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The atmosphere:
A) has vertical wind speeds that are typically around one-tenth that of horizontal wind speeds. B) is about as deep as the planet is wide. C) is more than 99 percent contained within the first 60 miles from the earth's surface. D) has not changed substantially in composition since the earth formed over four billion years ago.
What national park, located in the Inland South, is the nation's most frequently visited?
A) Yellowstone B) Great Smokey Mountains C) The Black Hills D) Serpent Mound
Wastes dumped in the oceans at present are mainly
A. radioactive wastes, to keep them away from people. B. dredge spoils. C. highly toxic industrial wastes. D. organic wastes.
It is somewhat more difficult to project future energy needs than to project demand for minerals.
Answer the following statement true (T) or false (F)