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Practice Quiz
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1

The number of streams and rivers that are unsafe for swimming and fishing is greater today than it was 30 years ago in the US.
A)True
B)False
2

Potable water is best described as
A)Freshwater that is suitable for drinking
B)Freshwater that can be transported by pipes for distribution
C)Freshwater that is safe for swimming
D)All of the above
3

The vadose zone is an area below the ground that is
A)A source of groundwater
B)Confined above and below by impervious layers
C)Unsaturated
D)All of the above
4

Approximately what percent of the world's water is fresh water?
A)3
B)9
C)15
D)18
5

Domestic water use is greater than industrial or agricultural use of water in the US.
A)True
B)False
6

The Federal Water Pollution Control Act of 1972 has been responsible for improved surface water quality in the US.
A)True
B)False
7

Each resident of a North American home uses approximately 400 liters (100 gallons) of domestic water per day.
A)True
B)False
8

Eutrophication is best described as
A)The ability of plants to grow under nutrient-limited conditions
B)Excessive growth of algae and aquatic plants due to nutrient addition
C)Competition for nutrient and sunlight between two plant species
D)None of the above
9

What percent of industrial use water is used for cooling purposes in the US?
A)20
B)50
C)70
D)90
10

Major sources of groundwater contamination include
A)Agriculture
B)Underground storage tanks
C)Landfills
D)All of the above
11

Sewage treatment that provides water purification using physical settling of large particles is best defined as
A)Primary sewage treatment
B)Secondary sewage treatment
C)Tertiary sewage treatment
D)None of the above
12

Groundwater mining may cause
A)Habitat loss
B)Nutrient runoff
C)Land subsidence
D)All of the above
13

Nonpoint sources of pollution include
A)Air emissions from a factory smoke stack
B)Agricultural runoff from fields
C)Wastewater discharge from an industry
D)None of the above





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