Chapter 12 Section 1 & 2 Review: Question Preview (ID: 13636)

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The pH of water is a measure of its
a) saltiness. b) cloudiness. c) color. d) acidity.
Pure water is neutral, meaning it is neither an acid nor a base. Pure water has a pH of
a) 0 b) 10 c) 7 d) 14
Hard water contains high levels of
a) calcium and magnesium. b) soapsuds. c) sewage. d) Escherichia coli.
The first step in treating water from a river or lake is usually
a) chlorination. b) filtration. c) concentration. d) coagulation.
Why is chlorine added to drinking water?
a) Chlorine improves the taste of water. b) Chlorine prevents water from becoming cloudy. c) Chlorine kills disease-causing microorganisms. d) Chlorine softens hard water.
A drought is a long period of
a) heavy, damaging rains. b) rain coming late in the year. c) less rainfall than normal. d) unusually hot weather.
The process of obtaining fresh water from salt water is called
a) desalination. b) coagulation. c) conservation. d) filtration.
Using water wisely to avoid wasting it is called
a) desalination. b) irrigation. c) conservation. d) distribution.
The amount of one substance in a certain volume of water is called its
a) chlorine. b) pollution c) harndess d) concentration.
Smoke and exhaust from cars and factories create the form of water pollution called
a) fertelizers b) acid rain c) hardness d) pesticides
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