Question 1

Hot seawater dissolves metals as it circulates through oceanic crust.

Accepted Answer

A) True 
 B)False

Question 2

Deep, V-shaped, steep-walled valleys called __________ __________ are eroded into continental shelves and slopes.

Accepted Answer

submarine canyons

Question 3

Submarine canyons on continental shelves and slopes are cut by __________.

Accepted Answer

A)   longshore currents
B)   turbidity currents
C)   deep-sea currents
D)   sharksE) All of the above
F) C) and D)

Question 4

Samples can be taken from the deep sea floor by:

Accepted Answer

A)   coring devices.
B)   echo sounders.
C)   seismic profilers.
D)   remote sensing.E) B) and C)
F) A) and D)

Question 5

Beyond the Mid-Oceanic Ridge system are flat, level, featureless submarine surfaces called __________ __________.

Accepted Answer

The answer of Beyond the Mid-Oceanic Ridge system are flat,...

Question 6

Active continental margins do not have continental rises.

Accepted Answer

A) True 
 B)False

Question 7

Moving away from mid-ocean ridges, oceanic crust becomes:

Accepted Answer

A)   older, sinks, and forms the abyssal plains.
B)   younger, sinks, and forms the abyssal plains.
C)   older, rises, and becomes part of the continental shelf.
D)   younger, rises, and becomes part of the continental shelf.E) A) and D)
F) B) and C)

Question 8

Oceans cover about __________ percent of the Earth's surface.

Accepted Answer

A)   91
B)   81
C)   71
D)   61E) A) and B)
F) A) and D)

Question 9

Rift valleys are characterized by __________ faults and __________ earthquakes.

Accepted Answer

A)   reverse, shallow
B)   normal, shallow
C)   reverse, very deep
D)   normal, very deepE) A) and B)
F) A) and C) B

Question 10

Where two oceanic plates converge, subduction generates huge amounts of magma that erupt to form submarine volcanoes, and eventually island arcs.

Accepted Answer

A) True 
 B)False  True

Question 11

The Mid-Oceanic Ridge system is the Earth's largest mountain chain.

Accepted Answer

A) True 
 B)False

Question 12

The depth of the central parts of the ocean basins is about __________ kilometers.

Accepted Answer

A)   6
B)   5
C)   4
D)   3E) B) and D)
F) A) and B)

Question 13

At sea-floor vents, bacteria produce energy from hydrogen sulfide in a process called:

Accepted Answer

A)   sea-floor spreading.
B)   photosynthesis.
C)   subduction.
D)   chemosynthesis.E) B) and D)
F) A) and C)

Question 14

A/an __________ __________ is a deep trough in the crest of many mid-ocean ridges.

Accepted Answer

The answer of A/an __________ __________ is a deep trough...

Question 15

Oceanic crust is mostly composed of __________.

Accepted Answer

The answer of Oceanic crust is mostly composed of __________....

Question 16

A chain of volcanic islands that form along a subduction zone is called a/an __________ __________.

Accepted Answer

The answer of A chain of volcanic islands that form...

Question 17

Some of the world's richest offshore petroleum reserves are found on continental shelves.

Accepted Answer

A) True 
 B)False

Question 18

The west coast of South America is a passive continental margin.

Accepted Answer

A) True 
 B)False

Question 19

The continental rise on a passive continental margin is a/an:

Accepted Answer

A)   apron of terrigenous sediment that was transported across the continental shelf and deposited on the deep ocean floor at the foot of the continental slope.
B)   rugged surface formed by erosion of sediment near the abyssal plain.
C)   topographic surface formed as a portion of a lithospheric plate dives into the mantle.
D)   steep surface formed by accumulation of basalt near the continental margin.E) C) and D)
F) All of the above

Question 20

The part of oceanic crust made up of pelagic and terrigenous sediment is:

Accepted Answer

A)   layer 2.
B)   layer 1.
C)   layer 3.
D)   composed mainly of basalt pillows.E) B) and C)
F) C) and D)

Exam 15: Ocean Basins

Hot seawater dissolves metals as it circulates through oceanic crust.

Correct AnswerverifiedShow Answer

Deep, V-shaped, steep-walled valleys called __________ __________ are eroded into continental shelves and slopes.

Correct Answerverifiedsubmarine canyons

Submarine canyons on continental shelves and slopes are cut by __________.

Correct AnswerverifiedShow Answer

Samples can be taken from the deep sea floor by:

Correct AnswerverifiedShow Answer

Beyond the Mid-Oceanic Ridge system are flat, level, featureless submarine surfaces called __________ __________.

Correct AnswerverifiedShow Answer

Active continental margins do not have continental rises.

Correct AnswerverifiedShow Answer

Moving away from mid-ocean ridges, oceanic crust becomes:

Correct AnswerverifiedShow Answer

Oceans cover about __________ percent of the Earth's surface.

Correct AnswerverifiedShow Answer

Rift valleys are characterized by __________ faults and __________ earthquakes.

Correct AnswerverifiedB

Where two oceanic plates converge, subduction generates huge amounts of magma that erupt to form submarine volcanoes, and eventually island arcs.

Correct AnswerverifiedTrue

The Mid-Oceanic Ridge system is the Earth's largest mountain chain.

Correct AnswerverifiedShow Answer

The depth of the central parts of the ocean basins is about __________ kilometers.

Correct AnswerverifiedShow Answer

At sea-floor vents, bacteria produce energy from hydrogen sulfide in a process called:

Correct AnswerverifiedShow Answer

A/an __________ __________ is a deep trough in the crest of many mid-ocean ridges.

Correct AnswerverifiedShow Answer

Oceanic crust is mostly composed of __________.

Correct AnswerverifiedShow Answer

A chain of volcanic islands that form along a subduction zone is called a/an __________ __________.

Correct AnswerverifiedShow Answer

Some of the world's richest offshore petroleum reserves are found on continental shelves.

Correct AnswerverifiedShow Answer

The west coast of South America is a passive continental margin.

Correct AnswerverifiedShow Answer

The continental rise on a passive continental margin is a/an:

Correct AnswerverifiedShow Answer

The part of oceanic crust made up of pelagic and terrigenous sediment is:

Correct AnswerverifiedShow Answer

Correct Answer
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Deep, V-shaped, steep-walled valleys called are eroded into continental shelves and slopes.

Correct Answer
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submarine canyons

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Beyond the Mid-Oceanic Ridge system are flat, level, featureless submarine surfaces called .

Correct Answer
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Rift valleys are characterized by faults and earthquakes.

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B

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True

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A/an is a deep trough in the crest of many mid-ocean ridges.

Correct Answer
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A chain of volcanic islands that form along a subduction zone is called a/an .

Correct Answer
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