Question 1

The most common type of transform faults offset oceanic ____.

Accepted Answer

A)  abyssal plains
B)  microcontinents
C)  continental shelves
D)  trenches
E)  ridge crestsF) None of the above
G) A) and E)

Question 2

Magma that is created by ocean-continent convergence forms either island arcs or belts of igneous activity on the edges of continents.

Accepted Answer

A) True 
 B)False

Question 3

Harry Hess proposed that the _______.

Accepted Answer

A)  sea floor moves
B)  continents drift
C)  magnetic field reverses
D)  magnetic poles wander
E)  the core is liquidF) D) and E)
G) A) and E)

Question 4

Magma heated by ocean-continent convergence may form a(n) _____ such as the Aleutian Islands.

Accepted Answer

A)  mantle diapir
B)  convection uplift
C)  abyssal plain
D)  magmatic arc
E)  hot spotF) A) and D)
G) C) and D)

Question 5

The ___ includes rocks of the crust and uppermost mantle.

Accepted Answer

A)  true ocean basin
B)  asthenosphere
C)  lithosphere
D)  ophiolites
E)  MohoF) D) and E)
G) A) and D) C

Question 6

Evidence in support of continental drift includes ____.

Accepted Answer

A)  glacial striation patterns
B)  fossil distribution on different continents
C)  fit of continental margins
D)  matching of geologic patterns on continents
E)  all of the choices are correctF) A) and C)
G) B) and E) E

Question 7

The apparent movement of the magnetic poles through geologic time is called _____.

Accepted Answer

A)  mantle plume motion
B)  polar drift
C)  sea-floor spreading
D)  continental drift
E)  polar wanderingF) B) and C)
G) B) and D)

Question 8

Measured rates of sea-floor spreading range from ______ cm/year.

Accepted Answer

A)  0.1 to 1
B)  100 to 1000
C)  1000 to 10,000
D)  1 to 24
E)  0.01 to 0.1F) A) and D)
G) C) and D)

Question 9

The inner wall of a trench consists of a(n) _____ of thrust-faulted and folded marine sediment and pieces of oceanic crust.

Accepted Answer

A)  accretionary wedge
B)  subduction wedge
C)  large amount of sea
D)  active volcano consisting
E)  a gapF) D) and E)
G) A) and E)

Question 10

Marine geologists can predict the age of igneous rocks of the sea floor by measuring _____.

Accepted Answer

A)  the percent of iron-rich minerals in the rock
B)  their grain size
C)  the velocity of earthquake waves
D)  their density
E)  magnetic anomaliesF) A) and C)
G) B) and C) E

Question 11

The basic idea of ______ is that the Earth's surface is divided into a few large plates that move slowly relative to one another.

Accepted Answer

A)  continental drift
B)  sea floor spreading
C)  mantle plumes
D)  plate tectonics
E)  isostasyF) B) and E)
G) C) and E)

Question 12

Lithosphere is remarkably constant in thickness across ocean basins.

Accepted Answer

A) True 
 B)False

Question 13

The downward plunge of cold lithosphere accounts for the existence of oceanic trenches as well as their low heat flow.

Accepted Answer

A) True 
 B)False

Question 14

Plate motion can be measured directly using ____.

Accepted Answer

A)  FBI
B)  GPS
C)  USGS
D)  NOAA
E)  GISF) A) and E)
G) C) and D)

Question 15

The San Andreas Fault is a transform fault.

Accepted Answer

A) True 
 B)False

Question 16

Wegener's theory of continental drift proposed that the continents plowed through oceanic crust.

Accepted Answer

A) True 
 B)False

Question 17

Young mountain belts,with their associated igneous intrusions,metamorphism,and fold-thrust belts,form at convergent boundaries.

Accepted Answer

A) True 
 B)False

Question 18

In this hypothesis the two sides of the mid-oceanic ridge are moving in opposite directions like slow conveyor belts.

Accepted Answer

A)  plate tectonics
B)  sea floor spreading
C)  continental drift
D)  continental collisions
E)  plate spreadingF) All of the above
G) A) and C)

Question 19

The Rift Valley in East Africa is an example of a _____.

Accepted Answer

A)  diverging plate boundary
B)  converging plate boundary
C)  transform plate boundary
D)  back arc spreading center
E)  continental riseF) All of the above
G) B) and E)

Question 20

Sea-floor spreading implies that sea-floor rocks should be ______________.

Accepted Answer

A)  the same age throughout
B)  youngest on the crest of mid-ocean ridges
C)  younger as water become colder
D)  younger toward the trench
E)  youngest on the continental shelfF) A) and D)
G) B) and E)

Exam 4: Plate Tectonics

The most common type of transform faults offset oceanic ____.

Correct AnswerverifiedShow Answer

Magma that is created by ocean-continent convergence forms either island arcs or belts of igneous activity on the edges of continents.

Correct AnswerverifiedShow Answer

Harry Hess proposed that the _______.

Correct AnswerverifiedShow Answer

Magma heated by ocean-continent convergence may form a(n) _____ such as the Aleutian Islands.

Correct AnswerverifiedShow Answer

The ___ includes rocks of the crust and uppermost mantle.

Correct AnswerverifiedC

Evidence in support of continental drift includes ____.

Correct AnswerverifiedE

The apparent movement of the magnetic poles through geologic time is called _____.

Correct AnswerverifiedShow Answer

Measured rates of sea-floor spreading range from ______ cm/year.

Correct AnswerverifiedShow Answer

The inner wall of a trench consists of a(n) _____ of thrust-faulted and folded marine sediment and pieces of oceanic crust.

Correct AnswerverifiedShow Answer

Marine geologists can predict the age of igneous rocks of the sea floor by measuring _____.

Correct AnswerverifiedE

The basic idea of ______ is that the Earth's surface is divided into a few large plates that move slowly relative to one another.

Correct AnswerverifiedShow Answer

Lithosphere is remarkably constant in thickness across ocean basins.

Correct AnswerverifiedShow Answer

The downward plunge of cold lithosphere accounts for the existence of oceanic trenches as well as their low heat flow.

Correct AnswerverifiedShow Answer

Plate motion can be measured directly using ____.

Correct AnswerverifiedShow Answer

The San Andreas Fault is a transform fault.

Correct AnswerverifiedShow Answer

Wegener's theory of continental drift proposed that the continents plowed through oceanic crust.

Correct AnswerverifiedShow Answer

Young mountain belts,with their associated igneous intrusions,metamorphism,and fold-thrust belts,form at convergent boundaries.

Correct AnswerverifiedShow Answer

In this hypothesis the two sides of the mid-oceanic ridge are moving in opposite directions like slow conveyor belts.

Correct AnswerverifiedShow Answer

The Rift Valley in East Africa is an example of a _____.

Correct AnswerverifiedShow Answer

Sea-floor spreading implies that sea-floor rocks should be ______________.

Correct AnswerverifiedShow Answer

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