Chapter two exam Flashcards
part three
Which is an example of a point source pollution?
a ruptured sewer pipe
A watershed is:
an area of land over which rain and other sources of water flow to drain into a body of water.
Desalination, the process that removes _____ from water, is _____.
salt and other minerals; expensive
What is the most common water contaminant in the U.S. municipal water supplies?
fecal material
What happens when the water table drops below sea level in aquifers near the ocean?
saltwater intrusion
Not having access to enough clean water supplies is known as:
water scarcity
Our per capita use of water is known as our:
water footprint.
What is a dead zone?
waters so depleted of oxygen that aquatic life suffers
Which factor would reduce the amount of water infiltration into an aquifer?
paved roads, monoculture lawns, gravel driveways, and buildings
Which causes of water pollution are due to human activity?
thermal pollution, stormwater runoff, raw sewage, underground chemical storage
Threats from fishing pressure include:
damage from dynamite
What is one important quality of an aquifer?
Bacteria and other contaminants are filtered out of the water by rocks and soil.
The water supply is replenished through infiltration of rain and snowmelt.
It is a source of potable water.
Individual homes can access the water supply by digging wells into the aquifer.
What plant nutrients are found in animal waste and fertilizer that can cause eutrophication?
both nitrogen and phosphorus
