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Ch 15 1/2
Test Description: Chapter 15
Instructions: Answer all questions to get your test result.
1) What is the salinity of sewater
A
3.5%
B
5.5%
C
10%
D
1.5%
2) Ocean Salinity is usually expressed in
A
parts per thousand
B
charts
C
pars per billion
D
chemical formula
3) What is the most abundant salt in the ocean
A
sodium choloride
B
magnesium
C
calcium choloride
D
patassium chloride
4) What is the principal source of dissolved substances in the oceans
A
evaporation
B
infiltraton
C
outgassing
D
weathering
5) Salinity varies from 33 ppt
A
83 ppt
B
45 ppt
C
35 ppt
D
38 ppt
6) What is the second major source of elements in sea water?
A
solar radiation
B
meteorites
C
lakes
D
Earth's interior
7) The highest salinity would be found in which of the following areas
A
area with lots of runoff
B
all of the answers are correct
C
area with high evaporation rate
D
area with high precipitation rate
8) The ocean layer or rapid temperature change with depth is know as the
A
mixed zone
B
trophic level
C
thermocline
D
deep zone
9) What is density
A
mass per unit area
B
mass per unit volume
C
weight per unit volume
D
weight per unit mass
10) In addition to salinity, what factor affects the density of seawater>
A
depth
B
latitude
C
temperature
D
salt content
*select an answer for all questions
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