Which of the following controls the rate of groundwater flow?
A. how fractured the rocks are
B. the permeability of the rocks
C. the slope of the water table
D. All of these choices are correct.
Answer: D
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The mantle can be separated into two different portions—the lower mantle and the upper mantle. The lower mantle is
A) completely solid due to extreme pressure that prevents rocks from melting. B) composed of putty that flows like molasses. C) rigid and cannot flow. D) predominantly liquid.
What do astronomers expect will be left at the center of our solar system once the Sun has gone through all its life stages?
A) a planet-sized diamond B) a red giant C) a black hole D) a wormhole
A type I survivorship curve, with higher death rates at older ages, is typical of ________
A) redwood trees B) dandelions C) large open-water ocean fish, such as tuna D) large mammals such as gorillas E) large reptiles such as alligators
A ________ is a submarine volcano
A) seamount B) caldera C) scoria cone D) dome