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True or False Quiz
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Determine whether each of the statements below is true or false.

1
The ocean is salty due to chemical weathering of the continents.
A)TRUE
B)FALSE
2
There are more detailed maps of Venus than of Earth's sea floor.
A)TRUE
B)FALSE
3
The continental shelves were exposed above sea-level during the last Ice Age.
A)TRUE
B)FALSE
4
The continental shelf is a submerged portion of the continent.
A)TRUE
B)FALSE
5
Submarine canyons were eroded into continental margins at times of lowered sea-level.
A)TRUE
B)FALSE
6
The continental rise is composed mostly of sediment derived from the continent.
A)TRUE
B)FALSE
7
Sediments of the continental rise can be kilometers thick.
A)TRUE
B)FALSE
8
The mid-ocean ridge is composed entirely of volcanic rocks.
A)TRUE
B)FALSE
9
The dominant rock type on the mid-ocean ridge is andesite.
A)TRUE
B)FALSE
10
Guyots were once active volcanoes.
A)TRUE
B)FALSE
11
Guyots were once volcanic islands.
A)TRUE
B)FALSE
12
Guyots often have coral reefs on their margins.
A)TRUE
B)FALSE
13
Quiet-type volcanic activity is characteristic of passive continental margins.
A)TRUE
B)FALSE
14
Turbidity currents can transport sediment 100's of kilometers from its source.
A)TRUE
B)FALSE
15
Earthquakes may trigger turbidity currents.
A)TRUE
B)FALSE
16
Turbidity currents are common on the mid-ocean ridge.
A)TRUE
B)FALSE
17
Exotic biological communities exist in the deep ocean.
A)TRUE
B)FALSE
18
There are undersea "geysers" at the mid-ocean ridge.
A)TRUE
B)FALSE
19
A variety of materials are actively mined from the seafloor.
A)TRUE
B)FALSE
20
The ocean has existed since early in Earth's history.
A)TRUE
B)FALSE





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