MG CH 14

24 July 2022
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25 test answers

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question
Which of the following represent the largest volume of freshwater found on Earth? A. Ice sheets and glaciers B. Water vapor in the atmosphere C. Rivers D. Lakes E. Groundwater
answer
A. Ice sheets and glaciers
question
Which of the following is a true statement about groundwater? A. Water in a groundwater system is stored in subsurface pore spaces and fractures. B. Water in a groundwater system moves in underground river and caverns. C. Groundwater makes up only about 6% of all liquid (unfrozen) fresh water. D. The groundwater table does not mimic surface topography. E. Groundwater makes up the largest total volume of freshwater on Earth today.
answer
A. Water in a groundwater system is stored in subsurface pore spaces and fractures.
question
In the ___, groundwater fills the pore space. A. Capillary fringe B. Unsaturated zone C. Water table D. Zone of saturation E. Bedrock
answer
D. Zone of saturation
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The water table ____. A. Reaches its lowest level beneath hills and ascends toward valleys. B. Surface is a subdued version of the surface topography C. Represents the lower limit of the zone of saturation D. Always comes into contact with streams E. Is only observed where it reaches the surface
answer
B. Surface is a subdued version of the surface topography
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A ___ is separated from the groundwater system by the unsaturated zone. A. Losing stream (connected) B. Losing stream (disconnected) C. Capillary fringe D. Gaining stream E. Lake
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B. Losing stream (disconnected)
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How would the water table be affected if Earth were made up of uniform, permeable material? A. The water table would be a little deeper. B. The water table would be unaffected. C. The water table would not exist. D. The water table would be a little shallower.
answer
C. The water table would not exist.
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Why does groundwater discharge to Earth's surface? A. Earth's surface is regular, and permeability decreases with depth within Earth. B. Earth's surface is irregular, and permeability increases with depth within Earth. C. Earth's surface is regular, and permeability increases with depth within Earth. D. Earth's surface is irregular, and permeability decreases with depth within Earth.
answer
D. Earth's surface is irregular, and permeability decreases with depth within Earth.
question
Which of the following would produce a LOWER water table? Choose all that apply. A.A decrease in the amount of discharge to surface water B.An increase in the amount of recharge to groundwater C.An increase in the amount of discharge to surface water D. A decrease in the amount of recharge to groundwater
answer
C.An increase in the amount of discharge to surface water D. A decrease in the amount of recharge to groundwater
question
How does the use of water by humans affect the water table? A. Use of water by humans increases discharge, resulting in raised water tables. B. Use of water by humans decreases discharge, resulting in lowered water tables. C. Use of water by humans increases discharge, resulting in lowered water tables. D. Use of water by humans decreases discharge, resulting in raised water tables.
answer
C. Use of water by humans increases discharge, resulting in lowered water tables.
question
What is the water table? A.The top of the saturated zone beneath Earth's surface B. The zone beneath Earth's surface that is saturated with water C. The bottom of the saturated zone beneath Earth's surface D. The zone beneath Earth's surface that is just above the zone that is saturated with water
answer
A.The top of the saturated zone beneath Earth's surface
question
How does the water table change around a pumping water well? A. The water table elevation decreases. B. The water table elevation stays the same. C. The water table elevation increases.
answer
A. The water table elevation decreases.
question
What is the cone of depression? A. The shape that the water table takes on near an inactive well. B. The shape that the water table takes on near a pumping well. C. The shape that the water table takes on near two pumping wells. D. The shape that the water table takes on near two inactive wells
answer
B. The shape that the water table takes on near a pumping well.
question
When will a cone of depression stop enlarging? A. When the amount of water flowing away from the well is greater than the amount of water being pumped out of the well B. When the amount of water flowing toward the well equals the amount of water being pumped out of the well C. When the amount of water flowing away from the well equals the amount of water being pumped out of the well D. When the amount of water flowing toward the well is greater than he amount of water being pumped out of the well
answer
B. When the amount of water flowing toward the well equals the amount of water being pumped out of the well
question
When might a well, Well A, go dry? A. When the cone of depression of a second well intersects the deepest pat of Well A B. When the cone of depression of Well A intersects the deepest part of a second well C. When the water table of a second well intersects the deepest part of Well A D. When the cone of depression of a second well intersects the cone of depression of Well A
answer
A. When the cone of depression of a second well intersects the deepest pat of Well A
question
A(n) ___ acts as a conduit that brings heated water to the surface. A. Fault B. Hot spring C. Underground chamber D. Magma body E. Water table
answer
A. Fault
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____ are intermittent springs that eject columns of water and steam at various time intervals. A. Yellowstone National Park B. Caverns C. Hot springs D. Geysers E. Springs
answer
D. Geysers
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What prevents water at the bottom of the underground caverns from boiling at the normal surface temperature? A. The water has a lot of room to expand; therefore, the boiling point increases. B. The pressure from the weight of overlying water causes the boiling point to increase. C. The addition of cooler water from surrounding pore space causes boiling point to increase. D. The magma body below does not reach a sufficient temperature for water to boil. E. The narrow conduits present between caverns cause boiling point to increase.
answer
B. The pressure from the weight of overlying water causes the boiling point to increase.
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Once overlying water heats to a sufficient temperature, it ___ and releases pressure on the water below. A. Flows downward downward the heat source B. Boils C. Condenses D. Flashes to steam E. Seeps into surrounding pore spaces
answer
D. Flashes to steam
question
What happens after a geyser erupts? A. Minerals precipitate in the caverns, preventing further eruptions. B. Water deep within the chambers turns to steam and quickly evacuates. C. The underground plumbing of the geyser has changed and eruption ceases. D. Cool groundwater seeps back into the underground chambers, and the cycle starts again. E. The empty chambers are filled with molten rock from below.
answer
D. Cool groundwater seeps back into the underground chambers, and the cycle starts again.
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Which common, rock-forming mineral or mineral group is most readily dissolved by groundwater? A. Clay minerals B. Feldspars C. Quartz D. Calcite
answer
D. Calcite
question
An artesian system is present when groundwater ___. A. Is pumped from an aquifer B. Under pressure is below the level of the aquifer C. Flows toward a pressure surface below the aquifer D. Under pressure rises above the aquifer level E. Flows easily through an aquifer
answer
D. Under pressure rises above the aquifer level
question
A ___ is located where the pressure surface is above the aquifer, but below the ground. A. Nonflowing artesian well B. Confined aquifer C. Cone of depression D. Perched aquifer E. Flowing artesian well
answer
A. Nonflowing artesian well
question
If a well is drilled into an aquifer where the pressure surface is both above the aquifer and the ground, a __ is formed. A. Flowing artesian well B. Perched aquifer C. Nonflowing artesian well D. Recharge area E. Confined aquifer
answer
A. Flowing artesian well
question
Which of the following is a requirement for an artesian system to exist? A. The aquifer must be unconfined for water to flow freely. B. Aquitards must be present both above and below the aquifer C. Water must be confined in a flat-lying aquifer. D. An aquitard must be present only above the aquifer E. An aquitard must be present only below the aquifer
answer
B. Aquitards must be present both above and below the aquifer
question
As shown by the South Dakota example, artesian systems ____. A. Do not require inclined aquifers to receive water in the recharge area B. Area artificial in origin C. Only occur in near-surface areas across short distances D. Are able to transmit water great distances from recharge to discharge areas E. Are not dependent on confining layers
answer
D. Are able to transmit water great distances from recharge to discharge areas