Question 1

The volcanoes of the Cascades Mountains are related to melting of rock associated with a ____________-plate boundary.

Accepted Answer

A)   convergent
B)   divergent
C)   transform A

Question 2

Broad,sediment-covered continental shelves are found along ____________.

Accepted Answer

A)   active margins
B)   passive margins
C)   internal margins
D)   inert margins B

Question 3

Evidence that glaciers once covered an area might include ______________.

Accepted Answer

A)   till and striations
B)   backwash and striations
C)   till and grabens
D)   backwash and grabens A

Question 4

______________ is an example of a continental rift and the ______________ is/are the result of collision.

Accepted Answer

A)   The Basin and Range Province; mid-ocean ridge
B)   A mid-ocean ridge; Himalayan Mountains
C)   The Basin and Range Province; Himalayan Mountains
D)   The San Andreas Fault; Himalayan Mountains

Question 5

Sea-floor spreading is driven by volcanic activity ____________.

Accepted Answer

A)   in the middle of abyssal plains
B)   along mid-ocean ridges
C)   at the edges of continental shelves
D)   along fracture zones

Question 6

Currently,most geologists ____________.

Accepted Answer

A)   continue to reject continental drift
B)   agree that continental drift occurs, but they still do not understand why it occurs
C)   agree that continental drift occurs; the mechanisms that drive drift are at work in the ocean basins and upper mantle and were unknown in Wegener's time
D)   agree that continental drift occurs; the mechanisms that drive drift are at work in the lower mantle and outer core and were unknown in Wegener's time

Question 7

The Wadati-Benioff zone extends down within the mantle to a maximum depth of ____________.

Accepted Answer

A)   30 km
B)   150 km
C)   670 km
D)   990 km

Question 8

This map depicts earthquakes,which coincide with areas where ___________.

Accepted Answer

A)   volcanoes also regularly occur
B)   movements of the crust take place
C)   rocks break and move
D)   All of the above are correct.

Question 9

Consult the figure below.Most of the pushing force driving plate motion is produced ____________.

Accepted Answer

A)   at mid-ocean ridges
B)   at subduction zones
C)   at collision zones
D)   in the interiors of continental plates

Question 10

Deep-oceanic trenches are features of ____________-plate boundaries.

Accepted Answer

A)   convergent
B)   divergent
C)   transform

Question 11

Virtually all of the sediment atop a downgoing plate becomes subducted into the mantle along with the plate.

Accepted Answer

A) True 
 B)False

Question 12

Wegener's evidence for a united Pangaea was so compelling that virtually all geologists agreed with the idea of continental drift during his lifetime.

Accepted Answer

A) True 
 B)False

Question 13

The number of lithospheric plates on the Earth has been variable through geologic time.Hundreds of millions of years ago,there were plates that no longer exist today.

Accepted Answer

A) True 
 B)False

Question 14

When two bodies of continental lithosphere are pulled together at a convergent boundary,the result is ____________.

Accepted Answer

A)   subduction
B)   collision and mountain formation

Question 15

Continental lithosphere ____________.

Accepted Answer

A)   is thicker than oceanic lithosphere
B)   contains more mafic rocks than oceanic lithosphere
C)   is denser than oceanic lithosphere
D)   contains no crustal material, consisting solely of lithified upper mantle

Question 16

Consult the figure below.Hawaii is an example of ____________.

Accepted Answer

A)   hot-spot volcanism
B)   mid-ocean ridge volcanism
C)   volcanic island arc
D)   transform margin

Question 17

In Wegener's evidence for continental drift,continents were proposed to fit together,such as the east coast of South America with the __________________ and the upper west coast of Africa with the _______________.

Accepted Answer

A)   west coast of Europe; east coast of South America
B)   lower west coast of Africa; east coast of South America
C)   west coast of Europe; east coast of North America
D)   lower west coast of Africa; east coast of North America

Question 18

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

Question 19

Large,thick,nonvolcanic mountain belts,like the Himalayas,have features associated with ____________-plate boundaries.

Accepted Answer

A)   convergent
B)   divergent
C)   transform

Question 20

Volcanoes that have submerged beneath the surface of the sea are termed ____________.

Accepted Answer

A)   mid-ocean ridges
B)   guyots
C)   fracture zones
D)   continental rises

Exam 2: The Way the Earth Works: Plate Tectonics

The volcanoes of the Cascades Mountains are related to melting of rock associated with a ____________-plate boundary.

Broad,sediment-covered continental shelves are found along ____________.

Evidence that glaciers once covered an area might include ______________.

is an example of a continental rift and the is/are the result of collision.

Sea-floor spreading is driven by volcanic activity ____________.

Currently,most geologists ____________.

The Wadati-Benioff zone extends down within the mantle to a maximum depth of ____________.

This map depicts earthquakes,which coincide with areas where ___________.

Consult the figure below.Most of the pushing force driving plate motion is produced ____________.

Deep-oceanic trenches are features of ____________-plate boundaries.

Virtually all of the sediment atop a downgoing plate becomes subducted into the mantle along with the plate.

Wegener's evidence for a united Pangaea was so compelling that virtually all geologists agreed with the idea of continental drift during his lifetime.

The number of lithospheric plates on the Earth has been variable through geologic time.Hundreds of millions of years ago,there were plates that no longer exist today.

When two bodies of continental lithosphere are pulled together at a convergent boundary,the result is ____________.

Continental lithosphere ____________.

Consult the figure below.Hawaii is an example of ____________.

In Wegener's evidence for continental drift,continents were proposed to fit together,such as the east coast of South America with the ____ and the upper west coast of Africa with the _.

At transform-plate boundaries ____________.

Large,thick,nonvolcanic mountain belts,like the Himalayas,have features associated with ____________-plate boundaries.

Volcanoes that have submerged beneath the surface of the sea are termed ____________.