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WorksheetsOceans
Total questions: 22
Worksheet time: 11mins
Name
Class
Date
1.
Approximately what percentage of Earth's surface is covered by oceans?
a)
40%
b)
50%
c)
60%
d)
70%
2.
Which ocean basin is the largest?
a)
the Atlantic
b)
the Indian
c)
the Pacific
d)
the Arctic
3.
The use of sound waves to determine the depth of the ocean is called...
a)
submarine sounding
b)
sonar
c)
satellite altimetry
d)
submersible sounding
4.
The gently sloping submerged surface that extends from the shore towards the ocean basin is
a)
shelf
b)
slope
c)
rise
d)
margin
5.
Important mineral deposits, including oil and natural gas, are associated with
a)
the ocean basin floor
b)
the continental shelf
c)
abyssal plains
d)
the continental rise
6.
What could gas hydrates be used for?
a)
as a landfill
b)
to make concrete
c)
as a source of energy
d)
as a source of cobalt and copper
7.
What is label one on the diagram?
a)
continental shelf
b)
continental rise
c)
abyssal plain
d)
deep ocean trench
8.
The most abundant salt in seawater is
a)
calcium chloride
b)
magnesium chloride
c)
sodium chloride
d)
sodium chloride
9.
Which process does NOT lead to a decrease in the salinity of water?
a)
runoff from land
b)
precipitation
c)
sea ice melting
d)
evaporation
10.
Which term refers to a rapid change of temperature with increasing depth of the ocean?
a)
pycnocline
b)
thermocline
c)
abyssalocline
d)
isothermal cline
11.
Which is NOT a zone in the 3 layered structure of the ocean based on density?
a)
mixed zone
b)
deep zone
c)
transition zone
d)
intertidal zone
12.
Organisms that drift with ocean currents are
a)
nekton
b)
pelagic
c)
neritic
d)
plankton
13.
Which term describes the upper part of the ocean into which sunlight penetrates?
a)
neritic zone
b)
intertidal zone
c)
oceanic zone
d)
photic zone
14.
Phytoplankton are usually found in the
a)
photic zone
b)
benthic zone
c)
abyssal zone
d)
aphotic zone
15.
The use of light energy by organisms to convert CO2 and H2O into organic molecules is
a)
chemosynthesis
b)
photosynthesis
c)
consumption
d)
decomposition
16.
During which season does primary productivity reach its peak in polar oceans?
a)
spring
b)
summer
c)
fall
d)
winter
17.
In temperate oceans, primary productivity is limited by
a)
nutrients and oxygen concentrations
b)
nutrients and and water temperature
c)
sunlight and oxygen concentrations
d)
sunlight and nutrients
18.
An ocean current moving from the equator toward a pole is
a)
cold
b)
warm
c)
cold in the Northern Hemisphere and warm in the South Hemisphere
d)
warm in the Northern Hemisphere and cold in the Southern Hemisphere
19.
Because of the Coriolis Effect, surface currents in the Southern Hemisphere are deflected to the
a)
left
b)
right
c)
north
d)
south
20.
Which term describe the rising of cold water from deeper layers to replace warmer surface water?
a)
density current
b)
down welling
c)
surface current
d)
upwelling
21.
The energy and motion from waves is derived from
a)
currents
b)
tides
c)
wind
d)
gravity
22.
The five huge circular-moving systems of ocean surface currents are called
a)
density currents
b)
fetches
c)
drifts
d)
gyres
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