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Online Quiz
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1
Algal blooms result from which type of surface water pollution?
A)sediment
B)heavy metal
C)nutrient
D)PCB
2
Toxins in surface water present a very difficult problem because
A)we do not know where they came from
B)very low concentrations can be hazardous
C)they cannot be detected
D)all of the above
3
Water polluted by organic matter
A)contains too much sediment
B)does not contain much oxygen
C)is strongly acidic
D)contains a high amount of oxygen
4
Surface water with no dissolved oxygen is probably contaminated by
A)acid rain
B)organic matter
C)PCB's
D)suspended sediment
5
Mine waste can be a source of what type of pollution?
A)organic matter
B)acid
C)nutrient
D)caustic
6
Which water pollutant comes primarily from non-point sources?
A)radioactive substances
B)sediment
C)toxins
D)heavy metals
7
DDT and certain other organic pollutants are particularly hazardous because they are
A)persistent
B)accumulated in animal tissue
C)concentrated in the food pyramid
D)all of the above
8
It has been difficult to reduce sediment pollution in streams because
A)sediment comes from point sources
B)sediment comes from non-point sources
C)very small amounts are dangerous
D)only chemicals are easily controlled
9
Which is a hazardous heavy metal pollutant?
A)lead
B)arsenic
C)mercury
D)all of the above
10
The average length of time a substance remains in a reservoir in a biogeochemical cycle is its
A)half-life
B)capacity
C)residence time
D)influx rate
11
Most industrial water pollution is
A)point-source pollution
B)non point-source pollution
C)radioactive
D)organic matter
12
Which hazardous waste is an organic compound?
A)arsenic
B)asbestos
C)DDT
D)all of the above
13
Which is a source of nutrient pollution of surface water?
A)sewage
B)fertilizer
C)detergents
D)all of the above
14
What is the source of most nitrogen pollution of surface water?
A)industry
B)sewage
C)fertilizer
D)detergents
15
Nitrogen pollution of the groundwater is worst where
A)surficial materials are permeable
B)surficial materials are impermeable
C)the area is urban
D)the area is industrial
16
Flow of contaminated groundwater creates a
A)discharge area
B)confined aquifer
C)recharge area
D)plume
17
Thermal pollution results primarily from
A)manufacturing
B)power generation
C)heating
D)irrigation
18
Biochemical oxygen demand is created in surface water by
A)toxic chemical pollution
B)organic-matter pollution
C)thermal pollution
D)all of the above
19
Surface water with essentially no dissolved oxygen is
A)anaerobic
B)toxic
C)aerobic
D)radioactive
20
Settling ponds can dramatically reduce which kind of surface-water pollution?
A)fertilizers
B)herbicides
C)sediment
D)all of the above





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