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Multiple Choice
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1

Of the total water supply, the amount that is available for human consumption and agriculture is
A)less than 1%.
B)about 3%.
C)about 50%.
D)over 97%.
2

Compared to the amount of surface water, the amount of water stored in groundwater is
A)1/10 as great.
B)roughly equal.
C)about 5 times as great.
D)roughly 30 times as great.
3

The average daily water use in the United States amounts to about how many liters per day?
A)150
B)570
C)1500
D)5700
4

A watershed is
A)a layer of permeable material capable of storing groundwater.
B)the land area drained by a stream.
C)the amount of precipitation released by a rainstorm.
D)the amount of water stored in the ground and in reservoirs.
5

A layer of heavy clay after a rain would be
A)highly porous and permeable.
B)quite porous, but not very permeable.
C)not very porous, but quite permeable.
D)neither porous nor permeable.
6

The Gulf of Mexico is a shallow sea of the
A)Atlantic Ocean.
B)Indian Ocean.
C)Pacific Ocean.
D)South American Ocean.
7

The two most common ions in seawater are sodium and
A)calcium.
B)carbonate.
C)magnesium.
D)chlorine.
8

The average salinity of the earth's oceans is about
A)0.35%.
B)3.5%.
C)35%.
D)none of these.
9

The characteristics of ocean waves are influenced by
A)wind speed.
B)length of time the wind blows.
C)the fetch.
D)all of these.
10

A current that moves parallel to the shore in the surf zone is called a
A)rip current.
B)longshore current.
C)undertow.
D)turbidity current.





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