Chapter 17: Groundwater

1.	The upper limit of the zone of saturation is called the __________.
2.	Much of the water that flows in rivers is not direct runoff from rain or snowmelt, but originates as groundwater.     True False
3.	__________ are streams that gain water from the inflow of groundwater through the streambed.
4.	Porosity is the __________.
5.	Permeable layers of rock, such as sand or gravel, that transmit groundwater freely are referred to as __________.
6.	A permeable rock layer that transmits water freely is referred to as an aquifer.     True False
7.	The mathematical relationship that relates groundwater velocity, head, length of flow, and permeability is __________.
8.	An intermittent hot spring that ejects a fountain of hot water and steam with great force is called a(n) __________.
9.	What is the source of heat for most hot springs and geysers? Visit this About Geysers page for more information.
10.	According to the information in this About Geysers page, which geyser field contains more than half of the world's geysers?
11.	As water is withdrawn from a well, the water table drops around the well and forms a(n) __________.
12.	The term artesian is applied to __________.
13.	All artesian wells are free-flowing.     True False
14.	The __________ aquifer, an important groundwater source for irrigation, extends beneath a large portion of the High Plains.
15.	The hydraulic gradient of a water table is determined by dividing the __________ by the length of flow between the recharge and discharge points.
16.	A good approximation of the rate that groundwater moves would be __________. You might find the information at this site helpful.
17.	The level of the water table is important in predicting all of the following EXCEPT __________.
18.	Land subsidence is an environmental problem that can be caused by groundwater withdrawal.     True False
19.	Regions of irregular terrain formed when groundwater dissolves rock are said to exhibit __________ topography.
20.	Most caverns are created __________.
21.	Karst topography is most likely to develop in regions with limestone bedrock and a wet climate.     True False
22.	Most karst landscapes are underlain by the rock __________.
23.	From where did the name "karst" originate? You might find this site useful and informative.
24.	The various dripstone features found in caves are collectively called speleothems.     True False
25.	Stalactites and stalagmites are examples of __________.
26.	Which one of the following would NOT be a characteristic feature of a karst landscape?
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