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How much pollution can the oceans tolerate?

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unknown; oceans can disperse a...

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What causes the death of game fish in cultural eutrophication?


A) salt
B) acid deposition
C) suffocation from lack of oxygen
D) toxic substances in the water

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

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Water pollution may interfere with the ability of organisms to find mates or food by scent.

A) True
B) False

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The excess nitrogen associated with a(n) _________________________ can cause extensive fish kills, shellfish contamination, and severe respiratory irritation for humans living nearby.

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What is one source of groundwater contamination?


A) sulfuric acid deposition in a lake
B) the drilling of residential wells
C) abandoned hazardous waste dumps
D) geological seismic surveys

E) None of the above
F) A) and D)

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What is a significant source of water pollution in terms of total mass?


A) fertilizer
B) water-soluble inorganic chemicals
C) oxygen-demanding waste
D) sediment

E) B) and C)
F) A) and D)

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What is a good indicator of water quality?


A) the number of coliform bacteria in the water body
B) the number of ducks in the water body
C) the number of fish in the water body
D) the number of snakes in the water body

E) A) and C)
F) B) and D)

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What is the leading nonpoint source of water pollution?


A) agriculture
B) runoff from city streets and storm sewers
C) municipal landfills
D) industrial wastes

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

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Which rating would a water quality specialist give to Canada's groundwater pollution problem?


A) It is a low-risk ecological problem but a high-risk health problem.
B) It is a high-risk ecological problem but a low-risk health problem.
C) It is a medium-risk ecological and health problem.
D) It is a high-risk ecological and health problem.

E) B) and D)
F) A) and B)

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Which of the following is NOT likely to occur in an area that depends on surface water for its drinking supply?


A) Water is run through sand filters.
B) Water is treated with ozone and fluoride to kill bacteria.
C) Water is purified with activated charcoal in a filtering strategy.
D) Water is allowed to settle to allow suspended matter to fall out

E) B) and D)
F) B) and C)

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Which type of process is secondary sewage treatment?


A) It is the process of educating the public to prevent water pollution.
B) It is a physical process.
C) It is a series of specialized chemical and physical processes.
D) It is a biological process.

E) B) and C)
F) C) and D)

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Flooding increases with economic and urban development.

A) True
B) False

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Which Great Lake was first to show intense effects of water pollution?


A) Lake Superior
B) Lake Ontario
C) Lake Huron
D) Lake Erie

E) A) and B)
F) C) and D)

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The worldwide largest demand for water is for the purpose of drinking.

A) True
B) False

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To further the sustainable use of water supplies, environmentalists are least likely to call for a decentralization of control of water supply and quality.

A) True
B) False

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Large quantities of nitrate and phosphate plant nutrients from runoffs can cause a harmful ___________________________________ that can be red, brown, or green.

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Which organisms are least likely to be killed by heavy oil components?


A) crabs
B) clams
C) marine birds
D) oysters

E) None of the above
F) A) and D)

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How can farmers sharply reduce fertilizer runoff?


A) by planting carbon-fixing plants
B) by planting buffer zones between cultivated fields and surface water
C) by using large amounts of fertilizer
D) by installing a transition zone between cultivated fields and surface water

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

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What percentage of Canada's surface freshwater is contained in the Great Lakes?


A) about 30%
B) about 50%
C) about 70%
D) about 90%

E) C) and D)
F) None of the above

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Which of the following is a point source of water pollution?


A) a livestock feedlot
B) urban land
C) cropland
D) an offshore oil well

E) None of the above
F) A) and D)

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