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29 Cards in this Set

  • Front
  • Back
Factories, sewage treatment plants, and oil wells are __________ sources of water pollution.
_______ sources of water pollution are relatively easy to monitor and regulate while ______ sources of water pollution are difficult to monitor and cleanup.
Non point
Atmospheric deposition of contaminants is an excellent example of
nonpoint pollution.
The water pollutant that most commonly threatens human health is
pathogenic organisms.
Coliform bacteria populations are routinely monitored in drinking water supplies, swimming pools, and at beaches because these bacteria
indicate the presence of feces in water.
High oxygen content in water is an indication that
water is clean enough to support game fish.
An oxygen sag occurs most often
immediately downstream of a pollution source.
When natural waters are overloaded with plant nutrients, such as nitrate and phosphate ions, they become
Cultural eutrophication results from
human activity
Red tides are a common problem in the Mediterranean Sea because of
heavy tourism and untreated sewage.
Toxic metals such as lead, cadmium, and mercury
can be toxic in extremely small quantities.
Minamata disease, named after a town in Japan, was caused by
mercury poisoning.
Acid precipitation is especially disruptive when it occurs in areas with_____because of the lack of________.
granite bedrock
buffering capacity
Dioxins, pesticides, and polychlorinated biphenyls are all types of
toxic organic compounds
The main reason that surface water pollution has largely decreased in the United States since 1950 is
the Clean Water Act.
Feedlots are a major cause of _________ in water.

coliform bacteria
All of these
All of these
______________ is an example of a natural process that is accelerated by human activities.

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.
All of these are examples of natural processes that are accelerated by human activities.
A river that was severely polluted with industrial chemicals and human sewage and has since been restored to excellent health is the
Thames in Europe.
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.
All of these
The Exxon Valdez disaster in Prince William Sound, Alaska, in 1989 was
one of many huge spills every year.
Municipal sewage can be an excellent source of _____________ that are otherwise expensive to mine.
useful metals
The potential problem with natural decay for human waste is that
it only works where population density is low.
Primary sewage treatment involves
removing solids from water.
Tertiary sewage treatment is designed to remove

nitrates and phosphates.
The advantage of effluent sewerage is that
since solids are removed, pipes and pumps to the central treatment plant can be small and cheap.
The city of Arcata, California, is notable because it designed a _________ to treat its sewage.
natural marsh
Best practical technology (BPT) is legally required for all
point source polluters.
Best available economically achievable technology (BAT) standards are standards set for
toxic substances.
Using duckweed in a lagoon as low-tech sewage treatment plants is an example of