Question 1

Continental shelves on active margins are larger and broader than those on passive margins.

Accepted Answer

A) True 
 B)False

Question 2

Submarine canyons found cutting into the continental shelf and slope are believed to have been created ________.

Accepted Answer

A)  by subduction
B)  by icebergs
C)  by rivers during the ice age
D)  by tectonic rifting

Question 3

Why does the Atlantic Ocean have the most extensive abyssal plains?

Accepted Answer

The nearest tectonic boundary ...

Question 4

Continental shelves are valuable locations that support important fishing grounds.

Accepted Answer

A) True 
 B)False

Question 5

What is the definition of subduction erosion?

Accepted Answer

A)  Sediments from the ocean floor are scraped off a subducting tectonic plate and adhere to the overriding plate.
B)  Diverging tectonic plates will cause rocks to slide downward along normal faults.
C)  Glaciers extending off the continent will scour deep grooves in continental shelves.
D)  Sediment and rock are scraped off the bottom of an overriding plate and transported into the mantle by a descending plate.

Question 6

Compare and contrast the formation of accretionary wedges and the process of subduction erosion.

Accepted Answer

Both will involve convergent plate bound...

Question 7

The Challenger Deep has previously been measured to have a depth of 10,994 meters.You have been sent to the part of the Pacific Ocean to verify this depth with an echo sounder.Assuming that Depth = 1/2 (1,500 m/sec*echo travel time) , approximately how many seconds should it take for the sound wave to leave your ship, strike the bottom of the Challenger Deep, and return if the depth is correct?

Accepted Answer

A)  10.5 seconds
B)  14.66 seconds
C)  17.39 seconds
D)  22.67 seconds

Question 8

Based on its slow rate of spreading, the East Pacific Rise has a gradual profile with gently sloping sides.

Accepted Answer

A) True 
 B)False

Question 9

Which of the following is not an example of a continental rift?

Accepted Answer

A)  East Africa
B)  Rhine Valley, Europe
C)  Lake Baikal, Siberia
D)  Appalachia, United States

Question 10

A(n) ________ is a sequence of layers composing the oceanic crust that includes sheeted dikes, basalts, and gabbro.

Accepted Answer

A)  passive margin
B)  ophiolite complex
C)  lithospheric sheeting
D)  flood basalts

Question 11

Which of the following scenarios would likely result in the development of a passive continental margin?

Accepted Answer

A)  Two tectonic plates colliding, creating a submarine trench
B)  Continental blocks rifting apart and becoming separated by seafloor spreading
C)  Two tectonic plates sliding past each other, rotating part of the crust
D)  A mantle plume creating a chain of volcanic islands across the seafloor

Question 12

Which of the following is a failed rift that formed in North America over one billion years ago?

Accepted Answer

A)  A Mid-Continent Rift
B)  East African Rift
C)  Chile Rise
D)  Kuril Trench

Question 13

Which of the following is associated with an active continental margin?

Accepted Answer

A)  Divergent boundaries
B)  Convergent boundaries
C)  Transform boundaries
D)  No tectonic boundaries nearby

Question 14

How do deep-ocean trenches form?

Accepted Answer

A)  Magma from a partially melting tectonic plate makes its way through the crust.
B)  Subducting lithosphere descends into the mantle.
C)  Two tectonic plates diverge and create a rift valley.
D)  Sediments from a turbidity current settle out in a deep ocean basin.

Question 15

Which of the following is an example of a mid-ocean ridge?

Accepted Answer

A)  Puerto-Rico Trench
B)  Challenger Deep
C)  Mid-Indian Ridge
D)  East Pacific Rise

Question 16

What kind of continental margin is visible in this image?

Accepted Answer

A)  Active
B)  Rift
C)  Passive
D)  Transform

Question 17

Volcanic islands such as the Hawaiian islands form as a result of ________.

Accepted Answer

A)  subduction
B)  rifting
C)  mantle plumes
D)  batholith emplacement

Question 18

Why are oceanic ridges elevated above the rest of the seafloor?

Accepted Answer

The basalt...

Question 19

Why does the lithosphere thicken as it moves away from a mid-ocean ridge?

Accepted Answer

Cooling of the asthe...

Question 20

Oceanic plateaus form from turbidity currents that flow down the continental slope.

Accepted Answer

A) True 
 B)False

Exam 13: Divergent Boundaries

Which of the following scenarios would likely result in the development of a passive continental margin?

Correct Answer
verified

Which of the following is an example of a mid-ocean ridge?

Correct Answer
verified

Continental shelves are valuable locations that support important fishing grounds.

Correct Answer
verified

Continental shelves on active margins are larger and broader than those on passive margins.

Correct Answer
verified

How do deep-ocean trenches form?

Correct Answer
verified

What kind of continental margin is visible in this image?

Correct Answer
verified

Based on its slow rate of spreading, the East Pacific Rise has a gradual profile with gently sloping sides.

Correct Answer
verified

Compare and contrast the formation of accretionary wedges and the process of subduction erosion.

Correct Answer
verified
Both will involve convergent plate bound...
View Answer

A(n) ________ is a sequence of layers composing the oceanic crust that includes sheeted dikes, basalts, and gabbro.

Correct Answer
verified

Oceanic plateaus form from turbidity currents that flow down the continental slope.

Correct Answer
verified

Which of the following is associated with an active continental margin?

Correct Answer
verified

Why does the Atlantic Ocean have the most extensive abyssal plains?

Correct Answer
verified
The nearest tectonic boundary ...
View Answer

Volcanic islands such as the Hawaiian islands form as a result of ________.

Correct Answer
verified

Why does the lithosphere thicken as it moves away from a mid-ocean ridge?

Correct Answer
verified
Cooling of the asthe...
View Answer

Correct Answer
verified

Why are oceanic ridges elevated above the rest of the seafloor?

Correct Answer
verified
The basalt...
View Answer

Which of the following is a failed rift that formed in North America over one billion years ago?

Correct Answer
verified

Submarine canyons found cutting into the continental shelf and slope are believed to have been created ________.

Correct Answer
verified

What is the definition of subduction erosion?

Correct Answer
verified

Which of the following is not an example of a continental rift?

Correct Answer
verified

Exam 13: Divergent Boundaries

Which of the following scenarios would likely result in the development of a passive continental margin?

Correct AnswerverifiedShow Answer

Which of the following is an example of a mid-ocean ridge?

Correct AnswerverifiedShow Answer

Continental shelves are valuable locations that support important fishing grounds.

Correct AnswerverifiedShow Answer

Continental shelves on active margins are larger and broader than those on passive margins.

Correct AnswerverifiedShow Answer

How do deep-ocean trenches form?

Correct AnswerverifiedShow Answer

What kind of continental margin is visible in this image?

Correct AnswerverifiedShow Answer

Based on its slow rate of spreading, the East Pacific Rise has a gradual profile with gently sloping sides.

Correct AnswerverifiedShow Answer

Compare and contrast the formation of accretionary wedges and the process of subduction erosion.

Correct AnswerverifiedBoth will involve convergent plate bound...View AnswerShow Answer

A(n) ________ is a sequence of layers composing the oceanic crust that includes sheeted dikes, basalts, and gabbro.

Correct AnswerverifiedShow Answer

Oceanic plateaus form from turbidity currents that flow down the continental slope.

Correct AnswerverifiedShow Answer

Which of the following is associated with an active continental margin?

Correct AnswerverifiedShow Answer

Why does the Atlantic Ocean have the most extensive abyssal plains?

Correct AnswerverifiedThe nearest tectonic boundary ...View AnswerShow Answer

Volcanic islands such as the Hawaiian islands form as a result of ________.

Correct AnswerverifiedShow Answer

Why does the lithosphere thicken as it moves away from a mid-ocean ridge?

Correct AnswerverifiedCooling of the asthe...View AnswerShow Answer

Correct AnswerverifiedShow Answer

Why are oceanic ridges elevated above the rest of the seafloor?

Correct AnswerverifiedThe basalt...View AnswerShow Answer

Which of the following is a failed rift that formed in North America over one billion years ago?

Correct AnswerverifiedShow Answer

Submarine canyons found cutting into the continental shelf and slope are believed to have been created ________.

Correct AnswerverifiedShow Answer

What is the definition of subduction erosion?

Correct AnswerverifiedShow Answer

Which of the following is not an example of a continental rift?

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
verified
Both will involve convergent plate bound...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
The nearest tectonic boundary ...
View Answer

Correct Answer
verified

Correct Answer
verified
Cooling of the asthe...
View Answer

Correct Answer
verified

Correct Answer
verified
The basalt...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified