Water Pollution

Question 1

watershed

Answer 1

Water runs off the land into area streams as runoff and

picks up sediment and water soluble substances

Question 2

cultural eutrophication

Answer 2

overnourishment of aquatic ecosystems with plant nutrients (mostly nitrates and phosphates) because of human activities such as agriculture, urbanization, and discharges from industrial plants and sewage treatment plants

Question 3

biochemical oxygen demand

Answer 3

amount of dissolved oxygen needed by aerobic decomposers to break down organic materials

Question 4

groundwater pollution

Answer 4

pollutants can seep into groundwater sources, such as gasoline, oil

Question 5

water hardness

Answer 5

The measure of the amount of calcium and magnesium in the water which enter from the
weathering of rocks

Question 6

turbidity

Answer 6

A measure of how clear water is.

Question 7

what are three disinfectants that are commonly used to make drinking water safe?

Answer 7

chlorine, UV light, peroxine

Question 8

septic tank

Answer 8

a large container that receives wastewater from the house. Used to treat household sewage and wastewater by allowing the solids to decompose and settle in a tank, then letting the liquid be absorbed by the soil in a drainage/leach field