The hydrologic cycle is driven primarily by ____.
A. solar energy
B. lunar tides
C. solar tides
D. mechanical energy
E. chemical energy
Answer: A
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Plantation agriculture and the Green Revolution both promote
A) monoculture. B) local foods. C) intensive subsistence. D) food security. E) food self-sufficiency.
Which of the following is true of methane?
a. It is a greenhouse gas. b. It is produced by rice paddies. c. It is produced naturally by wetlands and termites. d. All of these answers are correct. e. It is a greenhouse gas and it is produced by rice paddies only.
Westerly winds in the upper atmosphere at mid-latitudes in the Northern Hemisphere:
A) are a result of a pressure gradient that moves air from the poles toward the equator. B) are stronger in summer than in winter. C) are the reason most mid-latitude storms move from west to east. D) are moving perpendicular to 500 mb contours.
According to Figure 13.29, where did the oldest crust in North America form?
A) in northern Canada B) in southern Mexico C) in the Western Cordillera D) on the east side of the continent