Ch 15 1/2: Question Preview (ID: 1625)


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What is the salinity of sewater
a) 3.5%
b) 1.5%
c) 5.5%
d) 10%

Ocean Salinity is usually expressed in
a) parts per thousand
b) charts
c) chemical formula
d) pars per billion

What is the most abundant salt in the ocean
a) sodium choloride
b) calcium choloride
c) magnesium
d) patassium chloride

What is the principal source of dissolved substances in the oceans
a) weathering
b) infiltraton
c) outgassing
d) evaporation

Salinity varies from 33 ppt
a) 38 ppt
b) 45 ppt
c) 35 ppt
d) 83 ppt

What is the second major source of elements in sea water?
a) Earth's interior
b) solar radiation
c) lakes
d) meteorites

The highest salinity would be found in which of the following areas
a) area with high evaporation rate
b) area with high precipitation rate
c) area with lots of runoff
d) all of the answers are correct

The ocean layer or rapid temperature change with depth is know as the
a) thermocline
b) deep zone
c) mixed zone
d) trophic level

What is density
a) mass per unit volume
b) mass per unit area
c) weight per unit mass
d) weight per unit volume

In addition to salinity, what factor affects the density of seawater>
a) temperature
b) latitude
c) depth
d) salt content

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