Question 1

Pangea initially separated into two parts, the southern part is called ____.

Accepted Answer

A)   Rodinia
B)   Laurasia
C)   Panthallasia
D)   Gondwanaland
E)   AtlantisF) C) and E)
G) D) and E)

Question 2

The ___ includes rocks of the crust and uppermost mantle.

Accepted Answer

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

Question 3

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

Accepted Answer

A)   divergent boundaries
B)   continental rifts
C)   transform fault boundaries
D)   convergent boundaries
E)   hot spotsF) None of the above
G) A) and D)

Question 4

During extension in divergent plate boundaries a rift valley forms as a central ____.

Accepted Answer

A)   horst
B)   strike-slip fault
C)   graben
D)   mountain range
E)   subduction zoneF) A) and B)
G) A) and C)

Question 5

Pangea initially separated into two parts, a northern supercontinent, and a southern supercontinent.

Accepted Answer

A) True 
 B)False

Question 6

As a descending plate reaches depths of about 100 km, magma is generated in the overlying asthenosphere.

Accepted Answer

A) True 
 B)False

Question 7

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 E)
G) A) and D)

Question 8

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

Accepted Answer

A) True 
 B)False

Question 9

The Himalayan Mountains are thought to have formed ____.

Accepted Answer

A)   by continent-ocean convergence
B)   by ocean-ocean convergence
C)   by continent-continent convergence
D)   at a spreading center
E)   at a transform faultF) C) and D)
G) All of the above

Question 10

Lithosphere is remarkably constant in thickness across ocean basins.

Accepted Answer

A) True 
 B)False

Question 11

The head of large plumes that form "hot spots" may cause uplift and ____.

Accepted Answer

A)   andesitic volcanoes
B)   transform faults
C)   vast fields of flood basalt
D)   spreading centers
E)   subduction zonesF) A) and B)
G) A) and E) C

Question 12

The portion of a fracture zone between two offset portions of a ridge crest is called a transform fault.

Accepted Answer

A) True 
 B)False

Question 13

Divergent plate boundaries can occur where spreading occurs under a continent, for example ___.

Accepted Answer

A)   the Red Sea
B)   the Himalayan Mountains
C)   the Alps
D)   the Gulf of Mexico
E)   the Mediterranean SeaF) A) and D)
G) A) and E) A

Question 14

Plate motion can be measured directly using ____.

Accepted Answer

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

Question 15

Wegener reassembled the modern continents to form the giant super continent of Gondwanaland.

Accepted Answer

A) True 
 B)False

Question 16

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) B) and C)
G) B) and E)

Question 17

These plate boundaries are marked by shallow-focus earthquakes in a narrow zone for a single fault or in a broad zone for a group of parallel faults.

Accepted Answer

A)   divergent
B)   transform
C)   ocean-continent convergence
D)   subduction
E)   ocean-ocean convergenceF) None of the above
G) C) and D)

Question 18

The portion of a fracture zone between two offset portions of ridge crest is called a ____.

Accepted Answer

A)   normal fault
B)   strike-slip fault
C)   convergence zone
D)   Benioff zone
E)   transform faultF) A) and B)
G) A) and C)

Question 19

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 20

____ volcanoes can be found along subducting plate boundaries.

Accepted Answer

A)   Shield
B)   Cinder cone
C)   Andesitic
D)   Basaltic
E)   PegmatiticF) A) and D)
G) B) and D) C

Exam 19: Plate Tectonics

Pangea initially separated into two parts, the southern part is called ____.

Correct AnswerverifiedShow Answer

The ___ includes rocks of the crust and uppermost mantle.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

During extension in divergent plate boundaries a rift valley forms as a central ____.

Correct AnswerverifiedShow Answer

Pangea initially separated into two parts, a northern supercontinent, and a southern supercontinent.

Correct AnswerverifiedShow Answer

As a descending plate reaches depths of about 100 km, magma is generated in the overlying asthenosphere.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The Himalayan Mountains are thought to have formed ____.

Correct AnswerverifiedShow Answer

Lithosphere is remarkably constant in thickness across ocean basins.

Correct AnswerverifiedShow Answer

The head of large plumes that form "hot spots" may cause uplift and ____.

Correct AnswerverifiedC

The portion of a fracture zone between two offset portions of a ridge crest is called a transform fault.

Correct AnswerverifiedShow Answer

Divergent plate boundaries can occur where spreading occurs under a continent, for example ___.

Correct AnswerverifiedA

Plate motion can be measured directly using ____.

Correct AnswerverifiedShow Answer

Wegener reassembled the modern continents to form the giant super continent of Gondwanaland.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

These plate boundaries are marked by shallow-focus earthquakes in a narrow zone for a single fault or in a broad zone for a group of parallel faults.

Correct AnswerverifiedShow Answer

The portion of a fracture zone between two offset portions of ridge crest is called a ____.

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

____ volcanoes can be found along subducting plate boundaries.

Correct AnswerverifiedC

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C

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A

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C