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What is the approximate mixing time of the ocean?


A) 160 years
B) 1,600 years
C) 16,000 years
D) 1.6 million years

E) B) and C)
F) All of the above

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Rapid amounts of photosynthesis can create variations in the alkalinity of seawater.

A) True
B) False

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What is the general behavior of pH in seawater? What affect can pH levels at various depths?

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Answer should include:
• Seawater has an...

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Marine animals are unable to break down water molecules to acquire oxygen, but marine plants can produce enough carbon dioxide to support its own metabolism.

A) True
B) False

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What is not true of a mixture?


A) A mixture is different substances closely intermingled.
B) A mixture is able to maintain separate properties.
C) A mixture is able to disperse homogenously.
D) A mixture may have varying concentrations and properties throughout.

E) All of the above
F) C) and D)

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Pure water has four colligative properties associated with it.

A) True
B) False

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What is the Forchhammer's principle?


A) The saturation level of seawater
B) The constant proportion of solids in seawater
C) The components of seawater from weathering surface rocks
D) The measure of the total mass of halogen ions

E) A) and B)
F) C) and D)

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What is a solute?


A) A substance, usually a liquid, which dissolves other substances
B) A substance that dissolves into another substance
C) A mixture of two or more substances
D) A polar molecule

E) None of the above
F) A) and B)

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Residence times are dependent upon steady-state conditions and a well-mixed ocean.

A) True
B) False

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How do salinometers measure salinity?


A) It measures the number of salt molecules in a set mass of seawater.
B) It calculates the salinity based on the density of the seawater.
C) It measures the electrical conductivity of seawater samples.
D) It calculates the salinity by measuring the chlorinity.

E) C) and D)
F) A) and C)

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