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Online Quizzing
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1

Fresh water has a maximum density at ______ degrees centigrade.
A)0
B)4
C)-2
D)5
E)none of the above
2

The amount of energy required to change water from liquid to vapor is called the:
A)latent heat of solidification
B)latent heat of release
C)latent heat of boiling
D)latent heat of vaporization
E)latent heat of liquefaction
3

The addition of salt to water will:
A)raise the boiling point
B)lower the boiling point
C)lower the freezing point
D)both a and c
E)both b and c
4

The average salinity of the oceans is about ______ o/oo.
A)35
B)30
C)37
D)28
E)32
5

The average pH of seawater is about:
A)2.5
B)7.5
C)7.8
D)4.6
E)9.1
6

Pressure increases by one atmosphere for every increase of ______ m in depth.
A)100
B)20
C)50
D)1000
E)10
7

About ______ percent of incident light is absorbed in the first meter of seawater.
A)25
B)60
C)15
D)50
E)75
8

The velocity of sound in seawater is about ____________ m/s.
A)500
B)1000
C)1500
D)2000
E)2500
9

The residence time of iron in seawater is about ________ years.
A)140
B)500
C)10,000
D)300,000
E)1,000,000
10

Dissolved oxygen in seawater:
A)is produced by photosynthesis
B)is consumed by respiration and decay
C)can be gained or lost by direct exchange with the atmosphere
D)is least abundant at a depth of about 800 m
E)all of the above





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