11.3 Water Pollution

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

One reason polluted ground water pollution is difficult to clean that

• location of underground storage tanks is not always known

• pollutants cling to the materials that make up aquifers

• runoff contaminates the water supply

• all the above

sources of ocean pollution include

• oil spills

• direct dumping of wastewater

• activities on land

• all the above

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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

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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

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What is more affected by bio magnification?

• zooplankton

• fish

• plants

• top of the food chain

Law designed to improve water quality in the United States

• 1987 Water Quality

• 1972 Clean Water Act

• 1975 Safe Drinking Water Act

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What are the main sources of water pollution?

• Plastic, Paper, and Metal

• Snails in water

• Help, there is a boot with a snake inside of it that somehow in the nearby lake.

• Agriculture, Industry, and Community

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What can happen to fish when there is not enough oxygen in the water?

• They can suffocate

• They can't float

• They can't see.

• Nothing. Fish don't need oxygen.

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NGSS.MS-LS2-1

TRUE or FALSE. Many people on Earth do not have accces to clean water.

• TRUE
• FALSE

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