Greenland's ice sheet covers about ________ of the island
A) 100%
B) 80%
C) 65%
D) 50%
Answer: B
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Regarding troughs and ridges, it is true that:
A) they most closely approximate a spiral pattern. B) troughs are associated with high pressure. C) there is always an equal number of troughs and ridges across the continental United States. D) height contours for troughs are shifted toward the equator.
What are the advantages and disadvantages of China's dam-building policy? Is it wise for the Chinese government to emphasize dam construction?
What will be an ideal response?
Primary productivity is the direct result of
A. net primary productivity. B. grazers feeding on plants. C. respiration. D. photosynthesis.
Worldwide, coal deposits are
A. Decreasing at alarming rates B. Widespread and extensive C. Widespread but rarely in economic quantities D. Relatively difficult to find E. Highly unusual formations