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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
probably be too cold for life.
B
have oceans that were completely frozen.
C
have a different climate.
D
all answers are correct
2) The salinity of oceans
A
varies across the globe.
B
has no bearing on water density.
C
is the same everywhere.
D
is determined by the amount of sodium in the ocean.
3) What is a polar molecule?
A
A molecule found in only pure water.
B
A molecule only found at the poles.
C
A molecule that occurs when a molecule freezes.
D
a molecule with a shape that causes it to have a positive end and a negative end.
4) The average salinity of the oceans is
A
40 ppt.
B
35 ppt.
C
45 ppt.
D
37 ppt.
5) The salts in the oceans come from
A
comets.
B
ice melting at the poles.
C
runoff on the continents.
D
precipitation.
6) The ocean is stratified with _____ _______ water on top.
A
warm, more salty
B
warm, less salty
C
cold, more salty
D
cold, less salty
7) The bonds that connect one water molecule to another are ____ _____ bonds.
A
weak, covalent
B
weak, hydrogen
C
strong, covalent
D
strong, hydrogen
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
more dense, different from
B
less dense, the same as
C
more dense, the same as
D
less dense, different from
10) Water molecules sticking to one another is called
A
surface tension.
B
the colligative property.
C
adhesion.
D
cohesion.
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
more than
B
less than
C
the exact same
13) Salinity at the equator is _______ because of _______.
A
higher, precipitation
B
lower, runoff from rivers
C
higher, evaporation
D
lower, condensation
*select an answer for all questions
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