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15.2 Review - Water
Test Description: CPO Earth Science Water Resources
Instructions: Answer all questions to get your test result.
1) Pure water is water that contains:
A
potassium
B
no dissolved minerals
C
magnesium
D
calcium
2) The source of salt in Earth's oceans is:
A
underwater volcanoes.
B
dissolved minerals in teh oceans' crust.
C
All of the above.
D
weathered salt from rocks on Earth's surface.
3) The range of pH for most surface water is from
A
9.0 - 11.0
B
2.0 - 4.0
C
4.5 - 6.5
D
6.5 - 8.5
4) This element is present in older pipes and pipe solder, and if dissolved in water is toxic at very low concentrations.
A
Phosphorous
B
Nitrogen
C
Chlorine
D
Lead
5) These chemicals can get into water from fertilizer, septic systems, and farm runoff. They contribute to the growth of algae.
A
phosphates and nitrates
B
iron and copper
C
chlorine and flourine
D
lead and copper
6) Hard water is water that contains:
A
chlorine
B
flourine
C
caron dioxide
D
calcium and magnesium
7) List two chemicals that water treatment facilities add to drinking water.
A
calcium and chlorine
B
chlorine and flouride
C
flouride and iron
D
flouride and potassium
8) The government agency that sets the standards for clean water is the
A
IRS
B
FDA
C
COA
D
APS
9) A mineral dissolved in water may exist as a charged element or moelecule called a(n)
A
ion
B
solution
C
leaching
D
percipitate
10) What does the turbidity test measure?
A
the amount of oxygen dissolved in teh water
B
cloudiness of water
C
the pH (acidity of the water)
D
the number of phosphates
*select an answer for all questions
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