Environmental Science

Front 1

Factories, sewage treatment plants, and oil wells are __________ sources of water pollution.

Back 1

point

Front 2

_______ sources of water pollution are relatively easy to monitor and regulate while ______ sources of water pollution are difficult to monitor and cleanup.

Back 2

Point
Non point

Front 3

Atmospheric deposition of contaminants is an excellent example of

Back 3

nonpoint pollution.

Front 4

The water pollutant that most commonly threatens human health is

Back 4

pathogenic organisms.

Front 5

Coliform bacteria populations are routinely monitored in drinking water supplies, swimming pools, and at beaches because these bacteria

Back 5

indicate the presence of feces in water.

Front 6

High oxygen content in water is an indication that

Back 6

water is clean enough to support game fish.

Front 7

An oxygen sag occurs most often

Back 7

immediately downstream of a pollution source.

Front 8

When natural waters are overloaded with plant nutrients, such as nitrate and phosphate ions, they become

Back 8

eutrophic.

Front 9

Cultural eutrophication results from

Back 9

human activity

Front 10

Red tides are a common problem in the Mediterranean Sea because of

Back 10

heavy tourism and untreated sewage.

Front 11

Toxic metals such as lead, cadmium, and mercury

Back 11

can be toxic in extremely small quantities.

Front 12

Minamata disease, named after a town in Japan, was caused by

Back 12

mercury poisoning.

Front 13

Acid precipitation is especially disruptive when it occurs in areas with_____because of the lack of________.

Back 13

granite bedrock
buffering capacity

Front 14

Dioxins, pesticides, and polychlorinated biphenyls are all types of

Back 14

toxic organic compounds

Front 15

The main reason that surface water pollution has largely decreased in the United States since 1950 is

Back 15

the Clean Water Act.

Front 16

Feedlots are a major cause of _________ in water.

phosphates
coliform bacteria
nitrates
viruses
All of these

Back 16

All of these

Front 17

______________ is an example of a natural process that is accelerated by human activities.

Eutrophication
The weathering and release of toxic inorganic minerals from rocks
The mobilization and concentration of soluble salts from groundwater
Sediment loading of rivers
All of these are examples of natural processes that are accelerated by human activities.

Back 17

All of these are examples of natural processes that are accelerated by human activities.

Front 18

A river that was severely polluted with industrial chemicals and human sewage and has since been restored to excellent health is the

Back 18

Thames in Europe.

Front 19

Water contamination in Eastern European countries results
mainly from inadequate sewage treatment.
All of these.
from agricultural pesticide runoff.
from industrial waste.
mainly from radioactivity from power plants.

Back 19

All of these

Front 20

The Exxon Valdez disaster in Prince William Sound, Alaska, in 1989 was

Back 20

one of many huge spills every year.

Front 21

Municipal sewage can be an excellent source of _____________ that are otherwise expensive to mine.

Back 21

useful metals

Front 22

The potential problem with natural decay for human waste is that

Back 22

it only works where population density is low.

Front 23

Primary sewage treatment involves

Back 23

removing solids from water.

Front 24

Tertiary sewage treatment is designed to remove

Back 24

nitrates and phosphates.

Front 25

The advantage of effluent sewerage is that

Back 25

since solids are removed, pipes and pumps to the central treatment plant can be small and cheap.

Front 26

The city of Arcata, California, is notable because it designed a _________ to treat its sewage.

Back 26

natural marsh

Front 27

Best practical technology (BPT) is legally required for all

Back 27

point source polluters.

Front 28

Best available economically achievable technology (BAT) standards are standards set for

Back 28

toxic substances.

Front 29

Using duckweed in a lagoon as low-tech sewage treatment plants is an example of

Back 29

bioremediation.