Ocean 115 - Introduction to Oceanography » Spring 2021 » Week 8 Post Reading Quiz Ocean Chemistry

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Question #1
A _________ is a homogeneous mixture formed when a solid ____________ gets dissolved in a liquid _________
A.   solution, solvent, solute
B.   solute, solvent, solution
C.   solvent, solution, solute
D.   solution, solute, solvent
Question #2
The average time water stays in the ocean before being removed through evaporation (or other means) is about ____.
A.   10 years
B.   100 years
C.   4,100 years
D.   9 days
Question #3
What is the term for ocean components not accounted for by the weathering of continents?
A.   conservative constituents
B.   colligative properties
C.   non-conservative constituents
D.   excess volatiles
Question #4
What type of water mass dissolves a higher concentration of gases?
A.   tropical water mass
B.   equatorial water mass
C.   polar water mass
D.   sub-tropical water mass
Question #5
The concentration of ____ increases with depth, and influences the calcium carbonate compensation depth.
A.   carbon dioxide
B.   nitrogen gas
C.   dissolved iron
D.   ammonia
Question #6
What happens to pH levels in regions where there is excess carbon dioxide present?
A.   The seawater is able to buffer enough that there is no change
B.   The pH levels increase in these regions.
C.   The pH levels decrease in these regions.
D.   The seawater becomes more alkaline.​
Question #7
Residence time can be calculated as
A.   how much of an element is in the ocean multiplied by the rate of outflow from the ocean
B.   how much of element is present in the ocean divided by the rate of inflow to the ocean
C.   the volume of water in the ocean divided by the rate of evaporation
D.   the concentration of salts in the ocean divided by the length of time it takes them to dissolve
Question #8
Choose which of the following statements DOES NOT apply to Forchhammer's Principle of Constant Proportions:
A.   can be used to calculate total salinity based on a laboratory determination of chlorinity
B.   states that there is a fixed ratio of conservative ions in seawater
C.   there will always be about twice as much chloride dissolved in the ocean as there is sodium
D.   is not concerned with residence time or the mixing time of the ocean

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