Water To Drink Question Preview (ID: 22862)
Treating Drinking Water.
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Which of the following is not a common source of drinking water?
a) icebergs
b) rivers
c) reservoirs
d) aquifers
The pH of water is a measure of its
a) saltiness
b) acidity
c) color
d) cloudiness
Pure water is neutral, meaning it is neither an acid nor a base. Pure water has a pH of
a) 0
b) 14
c) 7
d) 10
Hard water contains high levels of
a) calcium and magnesium
b) escherichia coli
c) sewage
d) soapsuds
The first step in treating water from a river or lake is usually
a) chlorination
b) coagulation
c) concentration
d) filtration
The amount of one substance in a certain volume of another substance is its
a) concentration
b) coagulation
c) filtration
d) desalination
Why is chlorine added to drinking water?
a) chlorine improvs the taste of water
b) chlorine softens hard water
c) chlorine kills disease-causing microorganisms
d) chlorine prevents water from becoming cloudy
What enables water to move through a system of pipes?
a) hardness
b) water pressure
c) pH
d) water quality
Household wastewater and the wastes in it are called
a) sewage
b) flocs
c) sludge
d) gray water
Many homes that are not connected to public sanitary sewers might dispose of sewage using a(n)
a) aquifer
b) septic system
c) reservoir
d) well
A condition in which an area with normally good precipitation gets scares rainfall for a few years is a
a) drought
b) pollutant
c) floc
d) demand
Using a resource wisely so that it will not be used up is called
a) filtration
b) conservation
c) distillation
d) coagulation
The process of obtaining fresh water from salt water is called...
a) desalination
b) filtration
c) conservation
d) coagulation
Which of the following is a way to conserve water?
a) taking longer showers
b) reusing water in a factory to cool hot machinery
c) letting the water run while you brush your teeth
d) using open ditches to carry water for irrigation
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