BESC chap 18 Test Questions with Answers
When natural waters are overloaded with plant nutrients, such as nitrate and phosphate ions, they become - Answer-Eutrophic
Cultural eutrophication results from - Answer-human activity
An oxygen sag occurs most often - Answer-immediately downstream fr...
BESC chap 18 Test Questions with
Answers
When natural waters are overloaded with plant nutrients, such as nitrate and phosphate
ions, they become - Answer-Eutrophic
Cultural eutrophication results from - Answer-human activity
An oxygen sag occurs most often - Answer-immediately downstream from a pollution
source
Toxic metals such as lead, cadmium and mercury - Answer-can be toxic in extremely
small quantities
Which of the following are inorganic toxic substances sometimes found in local water -
Answer-salts and lead
Algae blooms are a common problem in the mediterranean sea because of - Answer-
heavy tourism and untreated sewage
The sediments that make up the Ganges River delta in India are often toxic because
they - Answer-have concentrations of naturally occurring arsenic
Acid preparation is especially disruptive when it occurs in areas with ___ because of the
lack of _____ - Answer-crystalline bedrock; buffering capacity
Dioxins, pesticides and polychlorinated biphenyls are all types of - Answer-toxic organic
compounds
____ is an example of a natural process that is accelerated by human activities -
Answer-all of these
in order to avoid producing thermal plumes, power plants often - Answer-build cooling
towers or ponds
the main reason that surface water pollution has largely decreased in the united states
since 1950 is - Answer-the clean water act
in 1998, a change in the approach to water quality was initiated by ___with an emphasis
on ____ - Answer-the EPA, watershed management
The city of Arcata, California is notable because it designed a _____ to treat its sewage
- Answer-natrual marsh
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