Question 1

Which of the following is an example of a transform plate boundary?

Accepted Answer

A)  the East African Rift
B)  the Mid-Atlantic Ridge
C)  the Marianas Trench
D)  the San Andreas FaultE) A) and C)
F) C) and D)

Question 2

Which of the following plates is moving the fastest?

Accepted Answer

A)  the African Plate
B)  the North American Plate
C)  the Eurasian Plate
D)  the Pacific PlateE) C) and D)
F) None of the above

Question 3

Rhodinia is a supercontinent that formed

Accepted Answer

A)  after Pangea.
B)  at the same time as Pangea.
C)  before Pangea.
D)  Geoscientists have no idea when Rhodinia was formed.E) None of the above
F) A) and B)

Question 4

Which of the following forces is important in driving plate tectonics?

Accepted Answer

A)  the pulling force of a sinking lithospheric slab
B)  the pushing force of a plate sliding off a mid-ocean ridge
C)  the suction force of a retreating subduction zone
D)  all of the aboveE) C) and D)
F) B) and C)

Question 5

Which of the following is a type of convergent plate boundary?

Accepted Answer

A)  continental rift
B)  spreading center
C)  mid-ocean ridge
D)  subduction zoneE) A) and C)
F) A) and D)

Question 6

The convergence of the North American Plate with the Juan de Fuca Plate forms the ______ subduction zone.

Accepted Answer

A)  Marianas
B)  Andean
C)  Aleutian
D)  CascadiaE) A) and B)
F) A) and C)

Question 7

Who first proposed the three different kinds of plate boundaries widely accepted today?

Accepted Answer

A)  Tuzo Wilson
B)  Alfred Wegener
C)  Robert Dietz
D)  Harry HessE) None of the above
F) A) and D)

Question 8

When was the supercontinent of Pangaea assembled?

Accepted Answer

A)  approximately 100 million years ago
B)  approximately 1.0 billion years ago
C)  approximately 250 million years ago
D)  approximately 2.5 billion years agoE) None of the above
F) A) and C)

Question 9

Which of the following mountain ranges formed as a result of ocean-continent convergence?

Accepted Answer

A)  the Andes
B)  the Appalachians
C)  the Himalayas
D)  the UralsE) A) and B)
F) All of the above A

Question 10

Why are isochrons on the Pacific seafloor more widely spaced than isochrons on the Atlantic seafloor?

Accepted Answer

A)  The Pacific seafloor formed at a faster spreading rate than the Atlantic seafloor.
B)  The Pacific seafloor formed at a slower spreading rate than the Atlantic seafloor.
C)  The Pacific seafloor is older than the Atlantic seafloor.
D)  The Pacific seafloor is younger than the Atlantic seafloor.E) B) and C)
F) All of the above

Question 11

Regions of intense localized volcanism,such as Hawaii,form above plumes of fast-rising material that originate in the

Accepted Answer

A)  crust.
B)  deep mantle.
C)  lithosphere.
D)  outer core.E) A) and B)
F) C) and D)

Question 12

__________ are the most extensive mountain ranges on Earth today.

Accepted Answer

A)  the Alps
B)  the Himalayas
C)  the Rockies
D)  mid-oceanic ridgesE) A) and D)
F) All of the above

Question 13

What two scientists related the positive and negative magnetic bands on the seafloor to seafloor spreading?

Accepted Answer

A)  Charles Darwin and James Hutton
B)  F.J.Vine and D.H.Mathews
C)  Harry Hess and Robert Dietz
D)  Alfred Wegener and Arthur HolmesE) None of the above
F) A) and B)

Question 14

If the position between antennas on two plates moving away from each other changes by 5 mm/yr,then each plate is moving at approximately

Accepted Answer

A)  5 mm/yr.
B)  2.5 mm/yr.
C)  10 mm/yr.
D)  1 mm/yr.E) B) and D)
F) C) and D)

Question 15

Which of the following is not associated with convergent plate boundaries?

Accepted Answer

A)  earthquakes
B)  deep-sea trenches
C)  spreading centers
D)  volcanoesE) A) and B)
F) A) and C)

Question 16

Which of the following plates contains only oceanic crust?

Accepted Answer

A)  North Atlantic Plate
B)  Australian Plate
C)  Nazca Plate
D)  African PlateE) A) and B)
F) C) and D) C

Question 17

Which of the following mountain ranges is the product of continent-continent convergence?

Accepted Answer

A)  the Andes
B)  the Cascade Range
C)  the Himalayas
D)  the Japanese islandsE) A) and C)
F) A) and D)

Question 18

On a map of the seafloor,the boundaries between normally magnetized oceanic crust and reversely magnetized oceanic crust are called

Accepted Answer

A)  dipoles.
B)  isochrons.
C)  isograds.
D)  sutures.E) B) and D)
F) None of the above

Question 19

The width of seafloor isochrons is directly related to

Accepted Answer

A)  their distance from a mid-ocean ridge.
B)  their age.
C)  spreading rate.
D)  the frequency of magnetic reversals.E) All of the above
F) C) and D)

Question 20

An island arc forms when there is __________ convergence.

Accepted Answer

A)  ocean-continent
B)  ocean-ocean
C)  continent-continent
D)  island-continentE) C) and D)
F) B) and D) B

Exam 2: Plate Tectonics: The Unifying Theory

Which of the following is an example of a transform plate boundary?

Correct AnswerverifiedShow Answer

Which of the following plates is moving the fastest?

Correct AnswerverifiedShow Answer

Rhodinia is a supercontinent that formed

Correct AnswerverifiedShow Answer

Which of the following forces is important in driving plate tectonics?

Correct AnswerverifiedShow Answer

Which of the following is a type of convergent plate boundary?

Correct AnswerverifiedShow Answer

The convergence of the North American Plate with the Juan de Fuca Plate forms the ______ subduction zone.

Correct AnswerverifiedShow Answer

Who first proposed the three different kinds of plate boundaries widely accepted today?

Correct AnswerverifiedShow Answer

When was the supercontinent of Pangaea assembled?

Correct AnswerverifiedShow Answer

Which of the following mountain ranges formed as a result of ocean-continent convergence?

Correct AnswerverifiedA

Why are isochrons on the Pacific seafloor more widely spaced than isochrons on the Atlantic seafloor?

Correct AnswerverifiedShow Answer

Regions of intense localized volcanism,such as Hawaii,form above plumes of fast-rising material that originate in the

Correct AnswerverifiedShow Answer

__________ are the most extensive mountain ranges on Earth today.

Correct AnswerverifiedShow Answer

What two scientists related the positive and negative magnetic bands on the seafloor to seafloor spreading?

Correct AnswerverifiedShow Answer

If the position between antennas on two plates moving away from each other changes by 5 mm/yr,then each plate is moving at approximately

Correct AnswerverifiedShow Answer

Which of the following is not associated with convergent plate boundaries?

Correct AnswerverifiedShow Answer

Which of the following plates contains only oceanic crust?

Correct AnswerverifiedC

Which of the following mountain ranges is the product of continent-continent convergence?

Correct AnswerverifiedShow Answer

On a map of the seafloor,the boundaries between normally magnetized oceanic crust and reversely magnetized oceanic crust are called

Correct AnswerverifiedShow Answer

The width of seafloor isochrons is directly related to

Correct AnswerverifiedShow Answer

An island arc forms when there is __________ convergence.

Correct AnswerverifiedB

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A

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C

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B