Which of the following has helped to reduce pressure on wild fish stocks?
a. Concentrated animal feeding operations
b. Sustainable agriculture
c. Aquaculture
d. Monocultures
Answer: C
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In which of these settings would a river or lake lose water to groundwater?
A) Where the water table adjacent to the river is higher than the river B) Where a lake is directly underlain by an impermeable layer C) Where a river flows across an area where the water table is far beneath the surface D) None of these are correct.
You are hiking in the desert. Just when you think you have run out of water, you see a cool spring. As you sip from the spring you are thinking:
A) "I may die from drinking this salt water." B) "Interesting. . . this spring is where the water table meets the land surface." C) "This spring is a clue that rain has recently fallen here." D) "This spring is a source of point pollution."
Wind erosion occurs by ____
A)saltation only B)abrasion only C)deflation only D)saltation and abrasion E)abrasion and deflation
Imagine two hypothetical cities, both located at 12° N latitude. However, one is located near sea level, while the other at an elevation of 4,000 m (13,123 ft) above sea level. Which of the following is likely true?
A) The climate of the two cities are quite similar. B) Annual temperatures for the city at the lower elevation are lower than those at the city at the higher elevation. C) The city at the higher elevation has extremely cold winters (similar to those at high latitudes). D) Though both cities are within the tropics, the city at the higher elevation has been average monthly and yearly temperatures lower than the city near sea level.