Moving progressively away from the ridges, the ocean water depths increase systematically with seafloor age due to all but which of the following?
A. Isostatic down warping due to the weight of sediments deposited on the sea floor
B. Conduction of heat away from warm surface rocks
C. Erosion of the older ocean floor by deep ocean currents
D. Cooling and contraction of the oceanic crust with a resultant increase in density
Answer: C
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A) systematic differentiation B) spatial regionalism C) the geographic region D) areal differentiation E) the cultural landscape
Volcanic eruptions
A) create ash that locally reduces sunlight. B) create acidic compounds that can be detected in ice cores. C) create small droplets that reach the stratosphere and reflect infrared heat back to Earth, thus warming Earth. D) all of the above E) none of the above
The primary factor in von Thünen's model for choosing commercial farm products is
A) land price. B) market location. C) climate. D) soil character. E) labor cost.
Which produces more energy, the fissioning of a single uranium nucleus or the fusing of a pair of deuterium nuclei? Why?
A) Fusing a pair of deuterium nuclei produces more energy because, unlike fission, there is no radioactive waste product. B) Fissioning a single uranium nucleus produces more energy since its mass is much greater than that of a pair of deuterium nuclei. C) Both the fissioning of a single uranium nucleus and the fusing of a pair of deuterium nuclei produce the same amount of energy since the resulting products are the same. D) Neither the fissioning of a single uranium nucleus nor the fusing of a pair of deuterium nuclei produces any net amount of energy. On the contrary, both processes require more energy than they produce.