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Multiple Choice Quiz
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1
The percentage of a rock's volume that is open space is:
A)vadose zone.
B)impermeable zone.
C)porosity.
D)the above
2
The capacity of a rock to transmit fluids is:
A)permeability.
B)impermeability.
C)porosity
D)saturation.
3
The saturated zone is:
A)the aquifer.
B)the water table.
C)the zone where all pores are filled with water.
D)the same as the vadose zone.
4
An aquifer is:
A)a body of rock containing water.
B)a body of rock that is impermeable.
C)a body of rock that blocks the flow of ground water.
D)a body of saturated rock or sediment through which water can move easily.
5
Which rock would most likely form an aquifer?
A)gneiss
B)siltstone
C)granite
D)sandstone
6
Why wouldn't the rocks above make a good aquifer?
A)They are too permeable to store water.
B)They have poor permeability.
C)They do not occur in layers.
D)They are too hard for wells to be drilled into them.
7
Which rock type below is likely to possess the lowest porosity?
A)granite
B)shale
C)conglomerate
D)sandstone
8
Which rock type below is likely to possess the highest permeability?
A)granite
B)siltstone
C)sandstone
D)shale
9
Which of the following determines how quickly groundwater flows?
A)water pressure
B)permeability
C)elevation
D)All of these are important determinants of groundwater flow.
10
Artesian aquifers flow:
A)from areas of high hydraulic head to areas of low hydraulic head.
B)from areas of high permeability to areas of low permeability.
C)from high elevation to low elevation.
D)always downhill.
11
The decline in the level of the water table around a pumping well is known as:
A)the sphere of influence.
B)the cone of depression.
C)the permeability gradient.
D)the porosity parameter.
12
Springs can be found in areas with igneous rocks due to the presence of:
A)porosity.
B)the vadose zone.
C)fractures.
D)geothermal water.
13
The largest reservoir of water on Earth is:
A)water vapor in the atmosphere.
B)groundwater.
C)the polar ice caps.
D)the ocean.
14
The top of the water saturated zone is known as:
A)the water table.
B)the hydraulic head.
C)the aquifer.
D)the aquitard.
15
The percentage of total precipitation that ends up as ground water is:
A)20-40 percent.
B)40-60 percent.
C)nearly all
D)1-20 percent.
16
An artesian well is one:
A)that is developed in an aquitard.
B)that flows to the surface without pumping.
C)located in the city of Artesia, California.
D)where a cone of depression develops around the well when pumped.
17
Geysers and hot springs:
A)are always at extremely high temperatures.
B)are common throughout the world.
C)are "Volcanoes of water."
D)are caused by groundwater being geothermally heated.
18
Caves and cavern systems are formed by:
A)groundwater dissolving limestone and dolomite.
B)removal of water from aquifers.
C)water moving through aquifers.
D)evacuation of magma chambers during volcanic eruptions.
19
What proportion of Earth's water resources occur as ground water?
A)33%
B)25%
C)10%
D)less than 1%
20
Gaining streams are those where:
A)water is lost from the stream to the saturated zone.
B)water from the saturated zone flows into the stream.
C)water is lost from the stream to the vadose zone.
D)water from the vadose zone flows into the stream.





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