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Worksheets2.1-Ocean Floor Review
Total questions: 22
Worksheet time: 11mins
Name
Class
Date
1.
Which two factors mainly determine the temperature of ocean water?
a)
sunspot activity and density
b)
volcanoes and wind
c)
salinity and nutrient concentration
d)
latitude and depth
2.
A mid-ocean ridge is a long narrow depression located in a deep-ocean basin
a)
TRUE
b)
FALSE
3.
Which of the following situations wold likely result in the lowest salinity content?
a)
A river's mouth empties fresh water into the ocean
b)
A factory dumps wastewater with 10% salinity into an area of the ocean
c)
Lots of sunlight causing rate of evaporation to increase
4.
Which pair of features of the ocean floor form as two tectonic plates pull away from each other?
a)
trench and abyssal plain
b)
hadal zone and abyssal plain
c)
rift zone and mid-ocean ridge
d)
trench and mid-ocean ridge
5.
How would the oceans change if they were no longer connected?
a)
Ocean temperatures would no longer change by latitude.
b)
They would no longer have a thermocline.
c)
The exchange of heat between oceans could no longer occur.
d)
Surface currents would no longer be able to form.
6.
Which is the main effect that a high rate of evaporation has in a given region of the ocean?
a)
decreased salinity
b)
higher temperature
c)
lower temperature
d)
increased salinity
7.
The ocean water along a region of the coast first becomes more dense, then less dense. What could explain this change?
a)
First, evaporation decreased salinity, then the water temperature increased.
b)
First, the water temperature decreased, then evaporation increased the salinity.
c)
First, evaporation increased the salinity, then the water temperature increased.
d)
First, the water temperature decreased, then evaporation decreased the salinity.
8.
Which of the following statements about the extent of Earth's global ocean is correct?
a)
It covers about the same amount of Earth's surface as land covers
b)
It covers more than twice as much of Earth's surface as land covers.
c)
It covers about half as much of Earth's surface as land covers.
d)
It covers more than three times as much surface as land covers.
9.
A water layer with great temperature changes
a)
continental margin
b)
deep-ocean basin
c)
thermocline
d)
ocean trench
10.
The edge of the continent covered by ocean water
a)
continental margin
b)
deep-ocean basin
c)
thermocline
d)
deep zone
11.
The measure of the amount of dissolved salts in a given amount of liquid
a)
salinity
b)
deep-ocean basin
c)
thermocline
d)
mid-ocean ridge
12.
A long, underwater mountain chain
a)
salinity
b)
deep-ocean basin
c)
thermocline
d)
mid-ocean ridge
13.
A long, narrow underwater depression
a)
continental margin
b)
deep-ocean basin
c)
thermocline
d)
ocean trench
14.
The part of the ocean that begins at the end of the continental margin
a)
continental margin
b)
deep-ocean basin
c)
rift zone
d)
ocean trench
15.
Which of the following would not be an example of technology to explore the sea floor?
a)
satelites
b)
robotics
c)
salinity
d)
sonar
16.
Which of the following would not be an example of technology to explore the sea floor?
a)
evaporation
b)
robotics
c)
sonar
d)
submersibles
17.
What two properties affect the density of the ocean water?
a)
time of day and season
b)
latitude and depth
c)
salinity and temperature
d)
tides and position of the moon
18.
Which of the following is not one of the five main oceans?
a)
Southern
b)
Indian
c)
Antarctica
d)
Atlantic
19.
Which of the following is not a temperature zone within the ocean?
a)
thermocline
b)
surface
c)
benthic
d)
deep
20.
Which of the following is the result of two plates colliding?
a)
ridge
b)
rift
c)
trench
d)
plain
21.
How do scientists use sonar to study Earth's oceans?
a)
to measure under water salinity
b)
to map ocean currents
c)
to map the ocean floor
d)
to measure water density
22.
Which value most closely matches the maximum depth of Earth's global ocean?
a)
20 Km
b)
11Km
c)
5Km
d)
1Km
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