In the United States, the majority of water
pollution of streams and lakes is from:
1.
2.
3.
4.
Point pollution from
sewage treatment
plants
Point pollution from
abandoned mines
Point pollution from
factories
Nonpoint pollution from
agriculture
25%
1
25%
2
25%
3
25%
4
Which of the following is not listed as a
major category of water pollution?
1.
2.
3.
4.
Plastics
Erosion
Acid deposition
Heat
25%
1
25%
2
25%
3
25%
4
True or false? Flooding tends to produce
cleaner drinking water by flushing rivers and
streams of debris and pollutants.
1. True
2. False
50%
1
50%
2
The oxygen sag curve is caused
by:
1. Inorganic wastes
2. Oxygendemanding
wastes
3. Sediments
4. Plant nutrients
25%
1
25%
2
25%
3
25%
4
Cultural eutrophication of lakes
is most often caused by input of:
25%
25%
25%
25%
1. Nitrates and
phosphates
2. Selenium
3. PCBs
4. Sediment
1
2
3
4
True or false? Since 1972, algal blooms in
the Great Lakes have decreased.
1. True
2. False
50%
1
50%
2
Groundwater cannot cleanse itself of
degradable wastes quickly because of all
but which one of the following reasons?
1.
2.
3.
4.
It has a high
concentration of
dissolved oxygen
It flows slowly
It has small
populations of
decomposing bacteria
Cold temperatures
slow down
decomposing
chemical reactions
25%
1
25%
2
25%
3
25%
4
Which of the following is a major
groundwater pollutant in parts of India and
Bangladesh?
25%
1.
2.
3.
4.
25%
25%
25%
Fluoride
Arsenic
Selenium
PCBs
1
2
3
4
By weight, the bulk of the phosphates
in Chesapeake Bay comes from:
25%
1.
2.
3.
4.
25%
25%
25%
Air pollution
Shellfish farms
Pesticide runoff
Sewage treatment
plants
1
2
3
4
Secondary sewage treatment:
1. Removes about 60%
of suspended solids
from sewage
2. Does not remove
any phosphorous or
nitrogen from
sewage
3. Utilizes aerobic
bacteria
4. Is a mechanical
process
25%
1
25%
2
25%
3
25%
4
About _____% of sewage sludge is
dumped in conventional landfills.
25%
1.
2.
3.
4.
25%
25%
25%
45
35
55
65
1
2
3
4
Using _____ would reduce the amount of
sewage output from homes and businesses.
1. Tertiary sewage
treatment
2. Composting toilet
systems
3. Sludge digesters
4. Anaerobic
digesters
25%
1
25%
2
25%
3
25%
4
Scientists call for a ban on
_____ in all new plumbing.
1.
2.
3.
4.
Copper
Selenium
PVC
Lead
25%
1
25%
2
25%
3
25%
4
True or false? Bottled water is always of
better quality than water from municipal
water suppliers.
1. True
2. False
50%
1
50%
2
True or false? The Cuyahoga River in Ohio
was so polluted it actually caught fire twice
(in 1959 and 1969).
1. True
2. False
50%
1
50%
2
_____ are bacteria that live in the colons and digestive
tracts of humans and other animals and are often
present in unsafe amounts in freshwaters.
1.
2.
3.
4.
Viruses
Shistosomiasis
Fecal coliform
Cholera
25%
1
25%
2
25%
3
25%
4
True or false? Pollution of coastal areas is
largely insignificant due to the large dilution
effects of ocean waters.
1. True
2. False
50%
1
50%
2