During the course of a year, the equatorial regions of Earth receive about ________ times as much solar energy as the polar regions.
A. 18
B. 36
C. 2.4
D. 0.7
E. 81
Answer: C
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During the past 130 years global temperatures [INSERT FIGURE 3-32. INCLUDE CAPTION]
A) have increased consistently B) have remained fairly constant C) have experienced periods of both cooling and warming D) have fluctuated wildly from year to year
All of the following are typical effects of dam construction except
A. interruption of the normal seasonal variation in flows of water. B. disruption of natural ecosystems. C. increased amount of sediment carried downstream of the dam. D. protecting towns from flooding.
If the Earth were an apple, the lower layer of the atmosphere would be the thickness of
a. the core b. the part of the apple we eat c. the skin d. the whole apple e. a seed