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ch 3 Water Treatment
Ch 3 Water Treatment
16
Science
6th Grade
11/14/2011

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Term
Chapter 3 Water Treatment
Definition
Term
Point Source
Definition
A specific source of pollution that can be identified, such as a pipe
Term
Water Pollution
Definition
Easier to prevent than clean up. Ex.of water pollution: Pesticides (used to kill organisms that damage crops)
Term
Eutrophication
Definition
Nutrients in a lake build up and lead to an increase in algae growth. The runoff from fertilizers pollutes lakes and ponds and increases the eutrophication process.
Term
Runoff that contains pollution
Definition
Pesticides from farm fields and oil from roads.
Term
pH
Definition
Measures acidity. pH of pure water is 7, which is neutral (neither acid nor base).
Term
Sewage
Definition
Ex. Household waste water and the wastes in it.
Term
Hard Water
Definition
Contains high levels of calcium and magnesium
Term
Septic System
Definition
Used by homes not connected to public sanitation sewers to dispose of their sewage.
Term
Common sources of drinking water
Definition
Rivers, Reservoirs, and Aquifers
Term
Aquifers
Definition
Underground layers of rock or sediment (that hold water) from which people obtain their water.
Term
Concentration
Definition
The amount of one substance in a certain volume of another substance.
Term
Chlorine
Definition
Used to kill disease-causing micro-organisms. It is added to drinking water to make it safer.
Term
Major sources of fresh water pollution
Definition
Human and animal waste, Agricultural chemicals, and Industrial wastes
Term
Primary Treatment
Definition
The first stage of treating wastewater which involves the removal of solid particles.
Term
Filtration
Definition
The first step in treating drinking water which involves passing water through a series of screens.
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