Question 1

Slab pull occurs because subducting slabs are _________,and therefore are _________ dense than the surrounding asthenosphere.

Accepted Answer

A)   hotter; less
B)   cooler; more
C)   hotter; more
D)   cooler; lessE) B) and C)
F) B) and D)

Question 2

Hot spots are caused by

Accepted Answer

A)   friction due to the lithosphere sliding atop the asthenosphere.
B)   unusually dense concentrations of radioactive isotopes at various points in the crust.
C)   hot plumes of mantle material that rise up through cooler,denser surrounding rock.
D)   zones of localized subduction that produce melting of the mantle.E) A) and D)
F) A) and C)

Question 3

Which of the following is true of continental lithosphere compared to oceanic lithosphere?

Accepted Answer

A)   Continental lithosphere is thicker than oceanic lithosphere.
B)   Continental lithosphere contains more mafic rocks than oceanic lithosphere.
C)   Continental lithosphere is denser than oceanic lithosphere.
D)   Continental lithosphere and oceanic lithosphere have similar compositions,densities,and thicknesses.E) B) and D)
F) A) and C)

Question 4

Marine magnetic anomaly belts run parallel to

Accepted Answer

A)   mid-ocean ridges.
B)   fracture zones.
C)   continental coastlines.
D)   continental shelves.E) C) and D)
F) All of the above

Question 5

At transform plate boundaries,

Accepted Answer

A)   earthquakes are common but volcanoes are absent.
B)   volcanoes are common but earthquakes do not occur.
C)   both earthquakes and volcanoes are common.
D)   neither earthquakes nor volcanoes are common.E) B) and C)
F) A) and D)

Question 6

Beneath a blanket of sediments,oceanic crust is primarily composed of

Accepted Answer

A)   granite.
B)   basalt.
C)   limestone.
D)   coal.E) None of the above
F) A) and B)

Question 7

Large,thick-crusted,nonvolcanic mountain belts,like the Himalayas,are associated with

Accepted Answer

A)   mid-ocean ridges.
B)   subduction zones.
C)   hot spots.
D)   continent-continent collisions.E) A) and B)
F) A) and C)

Question 8

Compare and contrast a convergent boundary involving two continental plates with a convergent boundary involving two oceanic plates.

Accepted Answer

At an ocean-ocean convergent plate bound...

Question 9

Which is likely to slowly flow when subjected to a geologic force?

Accepted Answer

A)   continental lithosphere
B)   oceanic lithosphere
C)   asthenosphere
D)   Neither the lithosphere nor asthenosphere flows when subjected to stress.E) B) and D)
F) B) and C)

Question 10

The majority of new oceanic crust is created

Accepted Answer

A)   at subduction zones.
B)   along fracture zones.
C)   at mid-ocean ridges.
D)   by hot spot volcanism.E) B) and D)
F) B) and C)

Question 11

Continental lithosphere is approximately 150 km thick,while old oceanic lithosphere away from mid-ocean ridges is

Accepted Answer

A)   1 km thick.
B)   100 km thick.
C)   similar in thickness to continental lithosphere.
D)   unpredictable,because the thickness of old lithosphere is highly variable.E) A) and B)
F) All of the above

Question 12

The angle on the globe or on a map between the direction a compass needle points and a line of longitude is called

Accepted Answer

A)   declination.
B)   inclination.
C)   subduction.
D)   striation.E) B) and C)
F) A) and B)

Question 13

In a hot-spot volcanic island chain,such as the Hawaiian Islands,which of the following is true?

Accepted Answer

A)   All volcanoes in the chain can be simultaneously active.
B)   The ages and distance between volcanoes can be used to calculate plate velocities.
C)   The presence of volcanism is related to a plate boundary.
D)   The magma source moves to form a hot-spot track.E) A) and D)
F) C) and D)

Question 14

Why is it possible for oceanic lithosphere to subduct under continental lithosphere at a convergent boundary but continental lithosphere cannot subduct under oceanic lithosphere?

Accepted Answer

Although the mantle portions of oceanic ...

Question 15

Continental coastlines that occur within the interior of a lithospheric plate are called ___________ margins.

Accepted Answer

A)   internal
B)   passive
C)   active
D)   inertE) C) and D)
F) A) and C)

Question 16

Deep-sea trenches are likely to be located near

Accepted Answer

A)   fracture zones.
B)   mid-ocean ridges.
C)   volcanic arcs.
D)   seamounts.E) A) and B)
F) A) and C)

Question 17

What are deep sea trenches and volcanic island arcs,and why are these features commonly adjacent to each other?

Accepted Answer

Deep sea trenches are elongate troughs o...

Question 18

Continental lithosphere does not subduct because it is too

Accepted Answer

A)   thick.
B)   buoyant.
C)   young.
D)   warm.E) A) and B)
F) A) and C)

Question 19

The rock produced at mid-ocean ridges consists of

Accepted Answer

A)   entirely basalt.
B)   entirely gabbro.
C)   basalt at shallow depths and gabbro at deeper depths.
D)   gabbro at shallow depths and basalt at deeper depths.E) B) and D)
F) A) and B)

Question 20

Marine magnetic anomalies in oceanic crust result from seafloor spreading in conjunction with

Accepted Answer

A)   global warming.
B)   magnetic storms on the surface of the Sun.
C)   magnetic polarity reversals.
D)   apparent wander of the magnetic poles.E) A) and D)
F) B) and D)

Exam 2: The Way the Earth Works: Plate Tectonics

What are deep sea trenches and volcanic island arcs,and why are these features commonly adjacent to each other?

Correct AnswerverifiedDeep sea trenches are elongate troughs o...View AnswerShow Answer

Marine magnetic anomaly belts run parallel to

Correct AnswerverifiedShow Answer

At transform plate boundaries,

Correct AnswerverifiedShow Answer

In a hot-spot volcanic island chain,such as the Hawaiian Islands,which of the following is true?

Correct AnswerverifiedShow Answer

Large,thick-crusted,nonvolcanic mountain belts,like the Himalayas,are associated with

Correct AnswerverifiedShow Answer

Continental coastlines that occur within the interior of a lithospheric plate are called ___________ margins.

Correct AnswerverifiedShow Answer

Why is it possible for oceanic lithosphere to subduct under continental lithosphere at a convergent boundary but continental lithosphere cannot subduct under oceanic lithosphere?

Correct AnswerverifiedAlthough the mantle portions of oceanic ...View AnswerShow Answer

Which of the following is true of continental lithosphere compared to oceanic lithosphere?

Correct AnswerverifiedShow Answer

The rock produced at mid-ocean ridges consists of

Correct AnswerverifiedShow Answer

Continental lithosphere is approximately 150 km thick,while old oceanic lithosphere away from mid-ocean ridges is

Correct AnswerverifiedShow Answer

Slab pull occurs because subducting slabs are _________,and therefore are _________ dense than the surrounding asthenosphere.

Correct AnswerverifiedShow Answer

Hot spots are caused by

Correct AnswerverifiedShow Answer

Marine magnetic anomalies in oceanic crust result from seafloor spreading in conjunction with

Correct AnswerverifiedShow Answer

Which is likely to slowly flow when subjected to a geologic force?

Correct AnswerverifiedShow Answer

The majority of new oceanic crust is created

Correct AnswerverifiedShow Answer

Continental lithosphere does not subduct because it is too

Correct AnswerverifiedShow Answer

The angle on the globe or on a map between the direction a compass needle points and a line of longitude is called

Correct AnswerverifiedShow Answer

Beneath a blanket of sediments,oceanic crust is primarily composed of

Correct AnswerverifiedShow Answer

Compare and contrast a convergent boundary involving two continental plates with a convergent boundary involving two oceanic plates.

Correct AnswerverifiedAt an ocean-ocean convergent plate bound...View AnswerShow Answer

Deep-sea trenches are likely to be located near

Correct AnswerverifiedShow Answer

Correct Answer
verified
Deep sea trenches are elongate troughs o...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Although the mantle portions of oceanic ...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Slab pull occurs because subducting slabs are _,and therefore are _ dense than the surrounding asthenosphere.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
At an ocean-ocean convergent plate bound...
View Answer

Correct Answer
verified