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The Ogallala aquifer is a massive aquifer beneath California.

A) True
B) False

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The difference between swamps and marshes is mainly one of ________.


A) trees versus grassland
B) high water table versus low
C) sandy soil versus clayey soil
D) salt water versus fresh water
E) seasonality of precipitation

F) A) and B)
G) C) and E)

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Into how many oceans is the "world ocean" usually divided?


A) 2
B) many
C) 4
D) 10
E) None, because there is truly one world ocean.

F) All of the above
G) A) and E)

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The top of the saturated zone of ground water is called the ________.


A) zone of saturation
B) vadose zone
C) water table
D) aquiclude
E) waterless zone

F) B) and E)
G) All of the above

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Water moving in response to salinity differences is part of the thermohaline circulation.

A) True
B) False

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Geographically speaking, the most important currents ________.


A) involve subsidence
B) involve upwelling
C) are caused by tides
D) are caused by underwater earthquakes
E) are the flows making up the oceans' general circulations

F) B) and D)
G) C) and D)

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The maximum time water can be excluded from the hydrologic cycle (that is, exist in "storage") is at least ________.


A) a day
B) a month
C) a year
D) hundreds of thousands of years

E) A) and B)
F) All of the above

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What negative environmental consequences are associated with the building of a dam?.

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Examples: siltation behind the...

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Lakes are common in areas which have been recently ________.


A) formed by volcanoes
B) glaciated
C) formed from river deposits
D) raised above the sea
E) hit by meteorites

F) A) and B)
G) B) and D)

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Approximately ________ percent of all atmospheric water comes from ocean surfaces.


A) 10
B) 50
C) 86
D) 95
E) 100

F) C) and D)
G) A) and D)

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In the middles of the oceans, high tides can best be described as ________.


A) steep-sided mounds
B) ridges
C) currents
D) waves
E) bulges

F) B) and E)
G) C) and E)

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Over a span of years, worldwide precipitation will equal total evaporation/transpiration.

A) True
B) False

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The tides with the maximum tidal elevation are ________ tides.


A) flood
B) high
C) ebb
D) spring
E) leap

F) C) and E)
G) A) and C)

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Which of the following is the SMALLEST part of the hydrologic cycle?


A) advection
B) runoff
C) underground water flow
D) evaporation
E) soil moisture

F) C) and E)
G) A) and B)

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Approximately ________ percent of the Earth's lake water is salty.


A) 10
B) 25
C) 40
D) 75
E) 85

F) C) and E)
G) All of the above

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Of the places listed below, ocean waters generally have the least salinity in ________.


A) subtropical zones
B) polar regions
C) small seas and gulfs
D) hot places
E) places with lack of rainfall

F) All of the above
G) D) and E)

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B

The tides migrate following ________ course around the Earth.


A) the Milky Way's
B) Venus'
C) Mars'
D) the Sun's
E) the Moon's

F) B) and C)
G) B) and E)

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E

A water molecule is composed of ________ atom(s) .


A) 0
B) 1
C) 3
D) 7
E) 16

F) B) and D)
G) C) and D)

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C

Underground water is much more widely distributed than surface water.

A) True
B) False

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In a year, farmers in the American Southwest use many times as much water from groundwater as is recharged to the groundwater.

A) True
B) False

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