11.3 Water Pollution

Water treatment involves..

• adding chlorine

• adding mercury

• removing fluoride

Point source pollution and non-point source pollution differ in

• biological agents causing pollution

• the source of pollution is agricultural

• the number of sources from which the pollution is discharged

• pollutants are chemical or physical

sources of ocean pollution include

• oil spills

• direct dumping of wastewater

• activities on land

• all the above

Tags

NGSS.MS-ESS3-3

NGSS.MS-ESS3-4

When neighborhood residents notice a large number of dead fish in a local creek, they traced the problem to a nearby gas station. It turned out that a gasoline tank had devolved a leak. This is an example of..

• Point- source pollution

• non- point source pollution

Tags

NGSS.MS-LS2-4

Some communities have banned detergents containing high levels of phosphates because

• phosphates cause chemical reactions that raise temperature of rivers, waters, and lakes.

• phosphates are not efficient cleaners

• excessive phosphates in lakes may begin a process that cause fish to suffocate and die

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

How much oil pollution comes from land?

• 75%

• 95%

• 90%

• 85%

Law designed to improve water quality in the United States

• 1987 Water Quality

• 1972 Clean Water Act

• 1975 Safe Drinking Water Act

Tags

NGSS.MS-ESS2-4

Pollution traced to a single point

• water shed

• permeable

• point source pollution

• non-point source pollution

Tags

NGSS.MS-ESS3-3

The Portion of water that flows across the surface that does not soak into the ground and runs into water bodies

• what

• fertilizer

• erosion

• runoff

Tags

NGSS.MS-ESS2-4

Pollution that cannot be traced to a single point because comes from many sources

• estuary

• water shed

• non point source pollution

• point source pollution