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