Which of the following is true about polar high-pressure areas?
A. They are responsible for the increased rate of sea ice melt.
B. They produce the polar easterlies.
C. They are stronger than all other pressure areas on Earth.
D. They are cyclonic.
Answer: B
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As of 2009, according to the U.S. Census Bureau, what percentage of Americans lived in an MSA?
A) 15 B) 37 C) 50 D) 68 E) 84
An important reason for the large daily temperature range over deserts is:
a. there is little water vapor in the air to absorb and re-radiate infrared radiation. b. the light-colored sand radiates heat very rapidly at night. c. dry air is a very poor heat conductor. d. free convection cells are unable to form above the hot desert ground. e. the ozone content of desert air is very low.
What is true of many industry estimates of the costs associated with pollution control regulations?
A. They are almost always more than the actual costs of complying. B. They typically underestimate the costs, resulting in the need for government assistance. C. They are usually reasonably accurate. D. They are usually quite similar to the estimates provided by environmental groups. E. They are typically quite similar to the governmental estimates.
Late successional plants are largely unaffected by plants at earlier stages of succession because they are not in direct competition for resources, a factor called ____.
A. facilitation B. imperturbability C. inhibition D. tolerance E. intolerance