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Properties Of Ocean Water
Test Description: Chemical and Physical Properties of Ocean Water
Instructions: Answer all questions to get your test result.
1) If ice did not float, Earth would
A
all answers are correct
B
probably be too cold for life.
C
have oceans that were completely frozen.
D
have a different climate.
2) The salinity of oceans
A
has no bearing on water density.
B
varies across the globe.
C
is determined by the amount of sodium in the ocean.
D
is the same everywhere.
3) What is a polar molecule?
A
a molecule with a shape that causes it to have a positive end and a negative end.
B
A molecule found in only pure water.
C
A molecule only found at the poles.
D
A molecule that occurs when a molecule freezes.
4) The average salinity of the oceans is
A
40 ppt.
B
37 ppt.
C
45 ppt.
D
35 ppt.
5) The salts in the oceans come from
A
precipitation.
B
ice melting at the poles.
C
comets.
D
runoff on the continents.
6) The ocean is stratified with _____ _______ water on top.
A
cold, less salty
B
warm, less salty
C
cold, more salty
D
warm, more salty
7) The bonds that connect one water molecule to another are ____ _____ bonds.
A
weak, hydrogen
B
strong, covalent
C
strong, hydrogen
D
weak, covalent
8) What is salinity?
A
is determined by the amount of sodium in the ocean.
B
all the organic dissolved solids in water.
C
the amount of sodium chloride in water.
9) Water becomes _____ when it freezes. This is ______ most substances.
A
less dense, different from
B
more dense, the same as
C
more dense, different from
D
less dense, the same as
10) Water molecules sticking to one another is called
A
surface tension.
B
cohesion.
C
the colligative property.
D
adhesion.
11) Hydrogen bonds form between
A
the oxygen of one molecule and the oxygen of another.
B
the oxygen of one molecule and the hydrogen of another.
C
the hydrogen of one molecule and the hydrogen of another.
12) Water is unique because in its frozen state its density is _____ when it's in the liquid state.
A
less than
B
the exact same
C
more than
13) Salinity at the equator is _______ because of _______.
A
higher, precipitation
B
higher, evaporation
C
lower, runoff from rivers
D
lower, condensation
*select an answer for all questions
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