Why do some communities inject treated wastewater into aquifers?
A) to recharge it artificially, since nature cannot keep up with urban demands
B) as a convenient place to dispose of water that is not suitable for other uses
C) for storage in a place that is not subject to as much evaporation as a reservoir
D) to prevent flooding due to too much wastewater above the surface
Answer: A
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A "weightless" astronaut in an orbiting shuttle is
A) shielded from Earth's gravitational field. B) beyond the pull of gravity. C) pulled only by gravitation to the shuttle which cancels Earth's gravitational pull. D) like the shuttle, pulled by Earth's gravitation. E) none of the above
A geologist looks at a piece of rock from Yosemite National Park under a microscope and sees tiny crystals of olivine, pyroxene, and plagioclase feldspar. What process might have formed this rock?
A) melting underground, violent volcanic eruption, and solidification above ground B) melting underground, flowing to Earth's surface, and solidification above ground C) solidification underground, violent volcanic eruption of ash and solid rock D) both melting and crystallization underground
This type of front has a mass of warm air cut off from the surface
A) warm front B) cold front C) stationary front D) occluded front
A prognostic chart:
A) evaluates past weather conditions to predict future ones. B) is used to explain the causes of thunderstorms as they are happening. C) displays numerical forecasts for future conditions in precipitation, wind speed, and upper air flow. D) is used to pinpoint the current location of fronts.