WorksheetsOceans Test Review
Total questions: 32
Worksheet time: 16mins
Name
Class
Date
1.
A convection current is any movement of matter that results from the differences in density.
a)
true
b)
false
2.
A mid-ocean ridge is a long, narrow depression located in a deep-ocean basin.
a)
true
b)
false
3.
What can you conclude about Earth's surface currents by looking at this map?
a)
currents flow counterclockwise in the Eastern Hemisphere
b)
currents flow counterclockwise in the Western Hemisphere
c)
currents flow counterclockwise in the Sourthern Hemisphere
d)
currents flow counterclockwise in the Northern Hemisphere
4.
What factor causes surface currents north and south of the equator to move in different directions?
a)
the sun's energy
b)
the Coriolis effect
c)
the density of water
d)
continental deflection
5.
What is the relationship between density and temperature?
a)
cold water is denser than warm water
b)
warm water is denser than cold water
c)
warm and cold water have equal densities
d)
the density of water is not affected by temperature
6.
Which factors most directly affect surface currents in the oceans?
a)
upwelling and convection
b)
deep currents and surface winds
c)
dissolved solids and the sun's energy
d)
surface winds and the Coriolis effect
7.
How should you draw arrows just south of the equator?
a)
The arrows should curve upward to the left (counterclockwise).
b)
The arrows should curve upward to the right (clockwise).
c)
The arrows should curve downward to the left.
d)
The arrows should be moving straight
8.
What causes convection currents to form in the oceans?
a)
surface winds
b)
the Coriolis effect
c)
continental deflection
d)
differences in water density
9.
Which of the following is most commonly found in ocean water?
a)
sodium sulfate
b)
sodium chloride
c)
calcium chloride
d)
magnesium sulfate
10.
What do the black arrows represent?
a)
movement of heat
b)
movement of nutrients
c)
movement of organisms
d)
movement of ocean water
11.
What role does heat play in the formation of convection currents?
a)
when water loses heat, it becomes denser and sinks
b)
when water gains heat, it becomes denser and sinks
c)
when water loses heat, it becomes less dense and rises
d)
temperature of water does not play a role in convection currents
12.
Which can cause an increase in density that results in a deep ocean current?
a)
the sun heats the water's surface
b)
a warm wind blows across cold water
c)
an iceberg melts, adding fresh water to the ocean water
d)
warm water loses energy to its surroundings and cools
13.
What is the relationship between the white and black arrows?
a)
the winds (white) are caused by the currents (black)
b)
the currents (black) are caused by the winds (white)
c)
the winds (white) and currents (black) alternate in which causes which
d)
there is no relationship between winds and currents
14.
Which correctly shows the chain of energy transfers that create surface currents on the ocean?
a)
solar (sun) energy -> wind energy -> surface currents
b)
wind energy -> solar energy -> surface currents
c)
tidal energy -> wind energy -> surface currents
d)
geothermal energy -> wind energy -> surface currents
15.
Which is a cause of these differences in salinity?
a)
changes in density of ocean water
b)
high evaporation rates at the ocean's surface
c)
dumping of salt into ocean water near coastal cities
d)
extraction of ocean water for desalination by coastal nations
16.
Which pair of factors determines the density of ocean water?
a)
salinity and latitude
b)
latitude and longitude
c)
salinity and temperature
d)
longitude and temperature
17.
A boat sends 2 SONAR pulses. The first returns after 3 seconds. The second returns after 5 seconds. What can you conclude?
a)
the water is becoming deeper
b)
the water is becoming less dense
c)
the water is becoming more dense
d)
the water is becoming shallower
18.
Which feature results from two tectonic plates diverging (pulling away from each other)?
a)
trench
b)
abyssal plain
c)
continental rise
d)
mid-ocean ridge
19.
How do scientists use SONAR to study Earth's oceans?
a)
the map ocean currents
b)
to map the ocean floor
c)
to measure water density
d)
to measure underwater earthquakes
20.
Which is the main effect that a high rate of evaporation has in a given region of the ocean?
a)
increased salinity
b)
decreased salinity
c)
lower temperature
d)
higher temperature
21.
Which is a principle that allows scientists to use SONAR to map the ocean floor?
a)
sound waves travel faster through gases
b)
sound waves travel faster through solids
c)
it takes more time for sound pulses to travel through deep water than through shallow water
d)
sound waves have a higher frequency when moving toward the sound
22.
Which of the following best explains this method of studying the ocean floor?
a)
a bright beam of white light is shone down to light up the ocean floor
b)
sound waves are being send down through the ocean to map the depths of the ocean floor
c)
a satellite is being used to measure variations in the gravitational field of Earth
d)
a remotely operated vehicle is being piloted from the ship to take pictures of the ocean floor
23.
What is the difference between a sea mount and a volcanic island?
a)
a volcanic island goes above the ocean's surface and a sea mount does not
b)
a sea mount goes above the ocean's surface and a volcanic island does not
c)
There is no difference between a sea mount and a volcanic island
24.
How could a sea mount become a volcanic island?
a)
a sea mount could continue erupting until it is tall enough to rise above the ocean surface
b)
a volcanic island could erose so it is no longer above the ocean surface
c)
a sea mount cannot change to become a volcanic island
25.
Which seafloor feature does A represent?
a)
Continental shelf
b)
Continental Rise
c)
Continental Slope
d)
Sea Mount
26.
Which seafloor feature does B represent?
a)
Continental shelf
b)
Continental Rise
c)
Continental Slope
d)
Sea Mount
27.
Which seafloor feature does C represent?
a)
Continental shelf
b)
Continental Rise
c)
Continental Slope
d)
Sea Mount
28.
Which seafloor feature does D represent?
a)
Volcanic Island
b)
Continental Rise
c)
Abyssal Plain
d)
Sea Mount
29.
Which seafloor feature does E represent?
a)
Volcanic Island
b)
Continental Rise
c)
Abyssal Plain
d)
Sea Mount
30.
Which seafloor feature does F represent?
a)
Volcanic Island
b)
Continental Rise
c)
Abyssal Plain
d)
Sea Mount
31.
Which seafloor feature does G represent?
a)
Trench
b)
Mid-Ocean Ridge
c)
Abyssal Plain
d)
Sea Mount
32.
Which seafloor feature does H represent?
a)
Trench
b)
Mid-Ocean Ridge
c)
Abyssal Plain
d)
Sea Mount
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