Chapter 11.4

any change in water quality that can harm living organisms or make the water unfit for human uses such as drinking, irrigation, and recreation

• Water pollution

• Point sources

• Nonpoint sources

• Wastewater

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NGSS.MS-LS2-4

NGSS.MS-LS2-5

Match the following - Types, Effects, and Sources of Major Water Pollutants

• Human and animal wastes

• Bacteria, viruses, protozoa, and parasites

• Sewage, animal wastes, inorganic fertilizer

• Lead, mercury, arsenic

• Unlined landfills, household chemicals, mining refuse, and industrial discharges

• Nitrates and phosphates

• Sewage, animal feedlots, food-processing facilities, paper mills

• Biodegradable animal wastes and plant debris

• Industry, farms, households

• Oil, gasoline, plastics, pesticides, cleaning solvents

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NGSS.MS-LS2-4

NGSS.MS-PS1-3

What is discharge pollutants into bodies of surface water at specific locations through drain pipes, ditches, or sewer lines

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NGSS.MS-ESS3-3

Broad and diffuse area, rather than a specific point, from which pollutants enter bodies of surface water or air.

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NGSS.MS-LS2-4

Wastewater

• water that contains sewage and other wastes from homes, farms, and industries

• Used water from bathtubs, showers, sinks, dishwashers, and clothes washers that can be stored in a holding tank and reused to irrigate lawns and nonedible plants, flush toilets, and wash cars

• Water that sinks into the soil and is stored in slowly flowing and slowly renewed underground reservoirs called aquifers; underground water in the zone of saturation, below the water table.

• Freshwater from precipitation and melting ice that flows on the earth’s surface into streams, lakes, wetlands, and reservoirs

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NGSS.MS-ESS2-4

NGSS.MS-ESS3-1

NGSS.MS-ESS3-4

Percentage of the raw sewage in most cities in less-developed countries that is discharged directly into rivers, streams, and lakes

• 50-60

• 60-70

• 70-80

• 80-90

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NGSS.MS-ESS3-4

NGSS.MS-LS2-4

Physical, chemical, and biological changes that take place after a lake, estuary, or slow-flowing stream receives inputs of plant nutrients—mostly nitrates and phosphates—from natural erosion and runoff from the surrounding land basin.

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NGSS.MS-LS2-3

NGSS.MS-LS2-4

Which two of these preventive solutions do you think are the most important? Why?

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NGSS.MS-ESS3-3

NGSS.MS-ETS1-3