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Unit 3 Water Pollution and Treatment

True/False
Indicate whether the statement is true or false.
 

 1. 

For many years, we regarded water as a means of disposing wastes.
 

 2. 

Diffuse pollution can be somewhat localized but cannot be tied to a specific input location.
 

 3. 

Water is one of nature’s most universal solvents.
 

 4. 

As water moves, it generates forces that pick up particles and carry them along.
 

 5. 

Many minerals and rocks are water soluble.
 

 6. 

As populations grew, cities had to install sewage disposal systems to take care of the large amounts of wastes.
 

 7. 

Test wells close to landfill sites help monitor the pollution of groundwater supplies from landfills.
 

 8. 

Because industry has more to lose from water pollution than any other segment of our economy, industry has also done the least to control water pollution.
 

 9. 

Radioactive pollution involves returning heated water to a stream or river.
 

 10. 

The dumping of heated water into a stream can create problems for both the stream or lake and the wildlife in and around the water.
 

 11. 

Water is one of the most basic natural resources.
 

 12. 

To thrive as an organized society, humans must remove significant amounts of water, use it in many different ways, and return almost all of it to the hydrologic cycle.
 

 13. 

Earth has almost 332,000,000 cubic miles of water.
 

 14. 

Water from clean groundwater needs little pretreatment before it is suitable for use.
 

 15. 

Water from rivers into which industrial, agricultural, and municipal wastes have been introduced upstream may require very extensive treatment.
 

 16. 

Used water must go through a treatment process before being safely returned to the hydrologic cycle.
 

 17. 

Water in nature is never pure and clean.
 

 18. 

Water is one of the most effective natural solvents.
 

 19. 

In a solvent, the molecules of one substance dissipate among the molecules of another substance.
 

 20. 

Water in nature holds many other substances in suspension.
 

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 

Which of the following is not one of the three basic sources of water pollution?
A.
point
C.
background
B.
diffuse
D.
significant
 

 2. 

____ source pollution results from the direct introduction of contaminants into the water supply at an identifiable location or multiple locations.
A.
Diffuse
C.
Point
B.
Nonpoint
D.
Background
 

 3. 

When the source of contamination can be precisely located, we refer to it as ____ source pollution.
A.
diffuse
C.
Nonpoint
B.
significant
D.
point
 

 4. 

____ source pollution is referred to as nonpoint source pollution.
A.
Significant
B.
Diffuse
 

 5. 

Industrial pollution of water can be divided into four major categories. Which of the following is not one of those categories?
A.
organic chemicals
D.
liquid materials
B.
radioactive materials
E.
inorganic materials
C.
thermal pollution
 

 6. 

Which of the following has not been cited by the Federal Water Pollution Control Administration as a contributor to industrial thermal pollution?
A.
chemical companies
C.
steel manufacturing plants
B.
electric power plants
D.
land development companies
 

 7. 

Which of the following is not a technique used to control thermal pollution?
A.
cooling towers
C.
cooling stands
B.
cooling lagoons
D.
none of these
 

 8. 

In cooling ____, the water passes through a series of coils around which air is forced by a fan and the moving air cools the water before it is returned to the stream.
A.
towers
B.
lagoons
 

 9. 

A cooling ____ is a pond beside the plant into which heated water flows.
A.
lagoon
B.
tower
 

 10. 

Scientists have developed the biological oxygen demand test, referred to as the ____ test, to determine the oxygen demand on water that directly indicates the amount of wastes in the water.
A.
BD
C.
BOD
B.
CCC
D.
the test
 

 11. 

Humans “use” about ____ cubic miles of water annually.
A.
700
C.
1,000
B.
300
D.
25
 

 12. 

Human waste products can come in all but what form?
A.
solid
C.
gas
B.
liquid
D.
slush
 

 13. 

Which of the following is not one of the two basic wastewater treatment systems?
A.
individual household systems
B.
large-scale wastewater treatment systems
C.
mechanical water treatment system
D.
none of these
 

 14. 

Very ____ particles may remain in suspension for extended periods of time.
A.
fine
C.
large
B.
thick
D.
solid
 

 15. 

Which of the following is not one of the three broad categories of impurities removed during the treatment process?
A.
turbidity
C.
situational impurities
B.
chemical impurities
D.
biological impurities
 

 16. 

Which of the following conditions does not result from chemical impurities?
A.
water that is safe to drink
C.
undesirable smells
B.
undesirable color
D.
water that is very turbid
 

 17. 

The pH of water should be near ____ neutral.
A.
3.5
C.
2.3
B.
7.0
D.
9.4
 

 18. 

Water with a pH much lower than 7.0 is ____ and can produce corrosive effects on metal equipment and pipes.
A.
acid
C.
neutral
B.
alkaline
D.
flavored
 

 19. 

Water with a pH higher than 7.0 is ____.
A.
acid
C.
alkaline
B.
flavored
D.
neutral
 

 20. 

____ water is a result of excess calcium or magnesium.
A.
Soft
B.
Hard
 

Matching
 
 
Match the question with the correct response
A.
background pollution
F.
nonpoint pollution
B.
temperature
G.
oxygen
C.
atomic nuclei
H.
thermal pollution
D.
tissues
I.
heat
E.
algae
J.
diffuse pollution
 

 1. 

Results from the introduction of contaminants across a wide area
 

 2. 

Results from ongoing, natural processes
 

 3. 

Also referred to as diffuse pollution
 

 4. 

Returning heated water to a stream or river
 

 5. 

Lost whenever energy changes from one form to another
 

 6. 

Fish use this to trigger spawning and migration
 

 7. 

Warmed water will contain less
 

 8. 

Heated water discharged for a long period of time increases its growth
 

 9. 

Disintegration of this causes elements to emit radiation
 

 10. 

Where fish and wildlife accumulate radioactive materials
 
 
Match the question with the correct response
A.
solution
F.
septic
B.
impurities
G.
solvent
C.
distilled
H.
protozoa
D.
bacteria
I.
pure
E.
alkaline
J.
moving
 

 11. 

Are single-celled animals that occur naturally in water
 

 12. 

Individual household wastewater treatment systems
 

 13. 

Substances that dissolve other substances
 

 14. 

When one substance is dissolved in another
 

 15. 

Water that holds large particles in suspension
 

 16. 

Must be removed before water can be used for human consumption
 

 17. 

Water that has no color, no taste, and no odor
 

 18. 

Corrosive water that also tends to produce scale
 

 19. 

Almost pure water
 

 20. 

Serve as decomposers and break down organic matter and chemicals into harmless compounds
 



 
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