Question 1

What transports most of the sediment that forms the continental rise?

Accepted Answer

A)   Plate tectonics
B)   Turbidity currents
C)   Convection
D)   Active margin geological activity

Question 2

What is a characteristic of transform faults?

Accepted Answer

A)   They are fractures along two plates that slide vertically.
B)   They move in opposite directions, horizontally of each other.
C)   They are just as active as fracture zones.
D)   All of these choices are true.

Question 3

What partly explains the seabed topography we observe?

Accepted Answer

A)   The jostling due to plate tectonics.
B)   The greater density of continental lithosphere.
C)   The presence of continental margins.
D)   The little interaction with the asthenosphere.

Question 4

What is not thought to have an effect on the formation of submarine canyons?

Accepted Answer

A)   The sea level
B)   Turbidity currents
C)   Earthquakes
D)   Geothermal heating

Question 5

Turbidity currents are propelled by the water within them.

Accepted Answer

A) True 
 B)False

Question 6

The continental margin is divided into three sections with the continental slope blending the continental margin into the deep-ocean basins.

Accepted Answer

A) True 
 B)False

Question 7

What is a disadvantage of using multibeam echo systems to map the entire seafloor?

Accepted Answer

A)   It can only detect a single narrow corridor of the seafloor.
B)   There are many beams that radiate from the ship's hull.
C)   There are very few vessels that are actually outfitted with these systems.
D)   The systems send a pulse of sound every ten seconds.

Question 8

Where does most of the material on the continental shelf come from?

Accepted Answer

A)   Erosion from the adjacent continent
B)   Sediments transported from rivers
C)   Accumulations behind natural dams
D)   New crust formation

Question 9

Describe how submarine canyons are formed? Where are they formed? How have past ice ages affected the formation of submarine canyons?

Accepted Answer

The answer of Describe how submarine canyons are formed? Where...

Question 10

Only temperature and salinity have an effect on the speed of sound.

Accepted Answer

A) True 
 B)False

Question 11

Active margins tend to be narrow in comparison to broad passive margins.

Accepted Answer

A) True 
 B)False

Question 12

____ are likely to be found in subduction zones.

Accepted Answer

A)   Abyssal hills
B)   Submarine canyons
C)   Mid-ocean ridges
D)   Trenches

Question 13

How long is it estimated to take the ocean's volume of water to circulate through the oceanic crust at spreading centers?

Accepted Answer

A)   1 million years
B)   10 million years
C)   100 million years
D)   1 billion years

Question 14

The weight of ice atop a continent can depress the depth of the shelf break.

Accepted Answer

A) True 
 B)False

Question 15

What is not a general characteristic of an active margin?

Accepted Answer

A)   A broad shelf
B)   Faulting and volcanism
C)   Varied topography
D)   Little sedimentation

Question 16

What statement is true of the surface area of oceanic ridges and their associated features?

Accepted Answer

A)   They consist of slightly less area than that of all the land above sea level.
B)   They consist of more area than that of all land above sea level.
C)   These are almost always located in the mid-ocean.
D)   These areas are largely covered by sediments.

Question 17

If oceanic ridges in the Pacific are more active, then it is expected that the ridges are:

Accepted Answer

A)   steeper in profile.
B)   narrow.
C)   wide.
D)   the only areas to find transform faults.

Question 18

The fundamental success of ocean depth measurements taken by satellites is based on the variation of gravitational pull associated with bathymetric features.

Accepted Answer

A) True 
 B)False

Question 19

What specifically connects the continental shelves to the deep-ocean floor?

Accepted Answer

A)   Continental rise
B)   Continental slope
C)   Shelf break
D)   Submarine canyon

Question 20

The submerged outer edge of a continent is called:

Accepted Answer

A)   a continental shelf
B)   a continental margin
C)   an active margin
D)   a continental rise

Exam 4: Ocean Basins

How long is it estimated to take the ocean's volume of water to circulate through the oceanic crust at spreading centers?

Correct AnswerverifiedShow Answer

Where does most of the material on the continental shelf come from?

Correct AnswerverifiedShow Answer

What statement is true of the surface area of oceanic ridges and their associated features?

Correct AnswerverifiedShow Answer

____ are likely to be found in subduction zones.

Correct AnswerverifiedShow Answer

What partly explains the seabed topography we observe?

Correct AnswerverifiedShow Answer

What is not thought to have an effect on the formation of submarine canyons?

Correct AnswerverifiedShow Answer

The weight of ice atop a continent can depress the depth of the shelf break.

Correct AnswerverifiedShow Answer

Only temperature and salinity have an effect on the speed of sound.

Correct AnswerverifiedShow Answer

Active margins tend to be narrow in comparison to broad passive margins.

Correct AnswerverifiedShow Answer

The continental margin is divided into three sections with the continental slope blending the continental margin into the deep-ocean basins.

Correct AnswerverifiedShow Answer

What specifically connects the continental shelves to the deep-ocean floor?

Correct AnswerverifiedShow Answer

Describe how submarine canyons are formed? Where are they formed? How have past ice ages affected the formation of submarine canyons?

Correct AnswerverifiedShow Answer

The submerged outer edge of a continent is called:

Correct AnswerverifiedShow Answer

What is not a general characteristic of an active margin?

Correct AnswerverifiedShow Answer

If oceanic ridges in the Pacific are more active, then it is expected that the ridges are:

Correct AnswerverifiedShow Answer

The fundamental success of ocean depth measurements taken by satellites is based on the variation of gravitational pull associated with bathymetric features.

Correct AnswerverifiedShow Answer

What is a disadvantage of using multibeam echo systems to map the entire seafloor?

Correct AnswerverifiedShow Answer

Turbidity currents are propelled by the water within them.

Correct AnswerverifiedShow Answer

What transports most of the sediment that forms the continental rise?

Correct AnswerverifiedShow Answer

What is a characteristic of transform faults?

Correct AnswerverifiedShow Answer

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