The population growth rate of the U.S. is currently well below 1%. What are some reasons why we
should not feel good about this? What will be an ideal response?
ANS:We
are not at zero growth; at the current rate, our population will still double in roughly 100 years. We
use a disproportionately large percentage of the world's resources per capita. We produce a
disproportionately large percentage of the world's waste per capita. Groundwater resources are
decreasing and so is the amount of farmable soil.
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If surface pressure readings were plotted on weather maps, they would give a false representation of the atmosphere because
A) high elevations have higher surface pressures than low elevations, even if the sea-level pressures are the same B) high elevations have lower surface pressures than low elevations, even if the sea-level pressures are the same C) the surface pressure at high elevations is often greater than sea-level pressure D) the surface pressure at high elevations is often the same as sea-level pressure
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
Which of the following represents a form of glacier ablation?
a. calving b. snowfall c. freezing rain d. crevasses e. sleet
Which of the following is not considered a form of electromagnetic radiation?
A) X-rays B) gamma rays C) gravity D) radio waves E) visible light