A) Is most toxic to humans in the form of methyl mercury. B) Is bio-concentrated (concentrations increase up the food chain), with the result that large fish like tuna may contain unacceptable levels. C) May be added to the atmosphere through the burning of coal, incineration of waste, smelting association with ore processing and processing of batteries. D) Is transferred from the atmosphere into water, where microorganisms transform it to methyl mercury. E) All of the choices are correct. A) Is most toxic to humans in the form of methyl mercury. B) Is bio-concentrated (concentrations increase up the food chain), with the result that large fish like tuna may contain unacceptable levels. C) May be added to the atmosphere through the burning of coal, incineration of waste, smelting association with ore processing and processing of batteries. D) Is transferred from the atmosphere into water, where microorganisms transform it to methyl mercury. E) All of the choices are correct.

Exam 17: Water Pollution

Because groundwater flow rates are often slow,groundwater pollution may first be detected many years after the occurrence of contamination and in areas distant from the pollution source.

(True/False)

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(77)

Question 21

Volumetrically,the largest non-point source of pollution in the United States is

(Multiple Choice)

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Question 22

Pump and treat technique is used for reversing the damage for

(Multiple Choice)

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Question 23

Residence time for water in Lake Tahoe,Nevada/California is 600 years which means that

(Multiple Choice)

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Question 24

Heavy metals accumulate in organisms,increasing in their amount up a food chain because they are concentrated in larger and larger organisms.

(True/False)

5.0/5

(83)

Question 25

When human activities alter natural chemical cycles of elements,they most often do so by

(Multiple Choice)

4.8/5

(89)

Question 26

Groundwater pollution can be reduced by introduction of microorganisms that may break down some of the wastes.

(True/False)

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Question 27

Lead,mercury and plutonium are these that have a tendency to accumulate in organisms.

(Multiple Choice)

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Question 28

Use of microorganisms to break down toxic organic compounds in ground water is called

(Multiple Choice)

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Question 29

The threat posed by some synthetic chemicals is difficult to assess because of lack of knowledge of their residence times in natural systems.

(True/False)

4.8/5

(78)

Question 30

Eutrophication caused by excess runoff of nitrate and phosphate fertilizer from farmland could be avoided by substitution of natural,organic fertilizers,like manures,for synthetic fertilizers.

(True/False)

4.8/5

(74)

Question 31

The pump-and-treat method is

(Multiple Choice)

5.0/5

(79)

Question 32

Water containing an abundance of nutrients,which encourages lush growth of such plants as algae is termed

(Multiple Choice)

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Question 33

Groundwater pollution

(Multiple Choice)

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Question 34

Mercury

(Multiple Choice)

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Question 35

If ground water is contaminated with petroleum products,pumping from a level close to the water table may selectively extract much of the pollution.

(True/False)

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(99)

Question 36

Nitrate in groundwater can be increased by infiltration of runoff from all of the following except

(Multiple Choice)

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(86)

Question 37

The escape of nutrients from sediments can be reduced or eliminated by any of the following strategies except

(Multiple Choice)

4.8/5

(85)

Question 38

What develops as a result of migration of the pollutant by groundwater that forms down-gradient with reference to the point source

(Multiple Choice)

4.8/5

(77)

Question 39

When the source of pollutant is readily identified by one location then the type of pollution is called

(Multiple Choice)

4.8/5

(74)

Question 40

Showing 21 - 40 of 54

Because groundwater flow rates are often slow,groundwater pollution may first be detected many years after the occurrence of contamination and in areas distant from the pollution source.

Volumetrically,the largest non-point source of pollution in the United States is

Pump and treat technique is used for reversing the damage for

Residence time for water in Lake Tahoe,Nevada/California is 600 years which means that

Heavy metals accumulate in organisms,increasing in their amount up a food chain because they are concentrated in larger and larger organisms.

When human activities alter natural chemical cycles of elements,they most often do so by

Groundwater pollution can be reduced by introduction of microorganisms that may break down some of the wastes.

Lead,mercury and plutonium are these that have a tendency to accumulate in organisms.

Use of microorganisms to break down toxic organic compounds in ground water is called

The threat posed by some synthetic chemicals is difficult to assess because of lack of knowledge of their residence times in natural systems.

Eutrophication caused by excess runoff of nitrate and phosphate fertilizer from farmland could be avoided by substitution of natural,organic fertilizers,like manures,for synthetic fertilizers.

The pump-and-treat method is

Water containing an abundance of nutrients,which encourages lush growth of such plants as algae is termed

Groundwater pollution

Mercury

If ground water is contaminated with petroleum products,pumping from a level close to the water table may selectively extract much of the pollution.

Nitrate in groundwater can be increased by infiltration of runoff from all of the following except

The escape of nutrients from sediments can be reduced or eliminated by any of the following strategies except

What develops as a result of migration of the pollutant by groundwater that forms down-gradient with reference to the point source

When the source of pollutant is readily identified by one location then the type of pollution is called

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