Question 1

Hot spots can be used as "fixed" reference points for determining plate speed and direction because:

Accepted Answer

A)  they move more slowly than the overlying plates. 
B)  they do not move at all. 
C)  they move in an opposite direction to the moving plate. 
D)  they move more rapidly than the overlying plates. 
A)  they move more slowly than the overlying plates. 
B)  they do not move at all. 
C)  they move in an opposite direction to the moving plate. 
D)  they move more rapidly than the overlying plates.

Question 2

The chimney- like structures around the "black smokers" are encrusted with:

Accepted Answer

A)  mineral precipitates rich in metals. 
B)  basaltic flows. 
C)  giant clams and exotic tubeworms. 
D)  copper, iron, zinc, and silver deposits. 
A)  mineral precipitates rich in metals. 
B)  basaltic flows. 
C)  giant clams and exotic tubeworms. 
D)  copper, iron, zinc, and silver deposits.

Question 3

What is a suture zone? Describe the geologic materials that might be included in the folded and faulted mountains that result from continental collisions.

Accepted Answer

A suture zone is the boundary between co

Question 4

All of the following are evidence of forces that drive plate movement EXCEPT:

Accepted Answer

A)  oceanic lithosphere moves laterally away from elevated mid- ocean ridges. 
B)  tears and fissures occur in axial rift valleys. 
C)  plates that are undergoing subduction are moving faster than plates that lack subducting margins. 
D)  magma rising between diverging oceanic plates causes folding in the newly formed lithosphere. 
A)  oceanic lithosphere moves laterally away from elevated mid- ocean ridges. 
B)  tears and fissures occur in axial rift valleys. 
C)  plates that are undergoing subduction are moving faster than plates that lack subducting margins. 
D)  magma rising between diverging oceanic plates causes folding in the newly formed lithosphere.

Question 5

Which of the following are conclusions that can be drawn about a plate's speed and direction of movement from a seamount chain?

Accepted Answer

A)  The youngest seamount will be the farthest from the hot spot, and an arrow from the seamount to the hot spot indicates the direction of plate movement. 
B)  The oldest seamount will be the farthest from the hot spot, and an arrow from the seamount to the hot spot indicates the direction of plate movement. 
C)  The oldest seamount will be the farthest from the hot spot, and an arrow from the hot spot to the seamount indicates the direction of plate movement. 
D)  The youngest seamount will be the farthest from the hot spot, and an arrow from the hot spot to the seamount indicates the direction of plate movement. 
A)  The youngest seamount will be the farthest from the hot spot, and an arrow from the seamount to the hot spot indicates the direction of plate movement. 
B)  The oldest seamount will be the farthest from the hot spot, and an arrow from the seamount to the hot spot indicates the direction of plate movement. 
C)  The oldest seamount will be the farthest from the hot spot, and an arrow from the hot spot to the seamount indicates the direction of plate movement. 
D)  The youngest seamount will be the farthest from the hot spot, and an arrow from the hot spot to the seamount indicates the direction of plate movement.

Question 6

List geographic examples of each stage of rifting, from the initial thinning of the crust to the closing of an ocean.

Accepted Answer

1) Initial crustal stretching and thinni

Question 7

Me´langes typically contain all of the following EXCEPT:

Accepted Answer

A)  siliceous and carbonate oozes. 
B)  basalts and serpentinized gabbros and peridotites. 
C)  submarine granites and andesites. 
D)  clastic sediments derived from the adjacent continent. 
A)  siliceous and carbonate oozes. 
B)  basalts and serpentinized gabbros and peridotites. 
C)  submarine granites and andesites. 
D)  clastic sediments derived from the adjacent continent.

Question 8

How do oceanic hot spots and continental hot spots differ?

Accepted Answer

Hot spots beneath oceanic plates produce

Question 9

The breadth of an arc- trench gap at a subduction zone is determined by:

Accepted Answer

A)  the angle at which the subducting plate descends. 
B)  the width of the volcanic arc. 
C)  the amount of material in the accretionary wedge. 
D)  the amount of material eroded from the adjacent continent and volcanic arc. 
A)  the angle at which the subducting plate descends. 
B)  the width of the volcanic arc. 
C)  the amount of material in the accretionary wedge. 
D)  the amount of material eroded from the adjacent continent and volcanic arc.

Question 10

Guyots are flat primarily because:

Accepted Answer

A)  they are volcanic and have been covered by horizontal basalt flows. 
B)  they are covered by horizontal layers of sediment. 
C)  they have been planed off by weathering, stream erosion, and ocean waves. 
D)  they are the tops of submarine horsts, fault blocks that have been raised from the sea floor. 
A)  they are volcanic and have been covered by horizontal basalt flows. 
B)  they are covered by horizontal layers of sediment. 
C)  they have been planed off by weathering, stream erosion, and ocean waves. 
D)  they are the tops of submarine horsts, fault blocks that have been raised from the sea floor.

Question 11

Which of the following statements about suture zones is NOT true?

Accepted Answer

A)  The suture zone may contain large masses of ophiolite rocks. 
B)  When the forward edges of two continental plates converge, neither subducts. 
C)  Thickening of the continental crust occurs because one plate is thrust slightly beneath the other. 
D)  Suture zones are likely zones of future rifting. 
A)  The suture zone may contain large masses of ophiolite rocks. 
B)  When the forward edges of two continental plates converge, neither subducts. 
C)  Thickening of the continental crust occurs because one plate is thrust slightly beneath the other. 
D)  Suture zones are likely zones of future rifting.

Question 12

Which of the following methods of studying the sea floor incorporates energy waves generated by small targeted explosions?

Accepted Answer

A)  Laser imaging. 
B)  Echo- sounding sonar. 
C)  Seismic profiling. 
D)  Microwave reflection. 
A)  Laser imaging. 
B)  Echo- sounding sonar. 
C)  Seismic profiling. 
D)  Microwave reflection.

Question 13

List the factors that drive plate tectonic. .

Accepted Answer

Geologists formerly believed that convec

Question 14

Which of the following is NOT a driving mechanism of plate tectonics?

Accepted Answer

A)  Gravity- induced sliding. 
B)  Slab pull. 
C)  Upper- mantle convection. 
D)  Ridge push. 
A)  Gravity- induced sliding. 
B)  Slab pull. 
C)  Upper- mantle convection. 
D)  Ridge push.

Question 15

The process of backarc spreading occurs as a result of:

Accepted Answer

A)  extensive sedimentation into the backarc basin from both the continent and the volcanic arc. 
B)  the rifting of the overriding plate and the extrusion of basaltic magma. 
C)  movement of the continental plate away from the subduction zone. 
D)  seaward migration of the volcanic arc as it is pulled toward the trench by the subducting plate. 
A)  extensive sedimentation into the backarc basin from both the continent and the volcanic arc. 
B)  the rifting of the overriding plate and the extrusion of basaltic magma. 
C)  movement of the continental plate away from the subduction zone. 
D)  seaward migration of the volcanic arc as it is pulled toward the trench by the subducting plate.

Question 16

Old, cold oceanic lithosphere is more dense than which of the following?

Accepted Answer

A)  The underlying warm asthenosphere of the upper mantle. 
B)  Younger oceanic lithosphere. 
C)  The continental lithosphere. 
D)  All of the above. 
A)  The underlying warm asthenosphere of the upper mantle. 
B)  Younger oceanic lithosphere. 
C)  The continental lithosphere. 
D)  All of the above.

Question 17

In which stage of the rifting process are plate edges considered to be passive continental margins?

Accepted Answer

A)  After rifting has been completed. 
B)  As basalts begin to fill the rift to form new ocean crust. 
C)  In the initial stages of continental rifting. 
D)  When seawater from an adjacent ocean inundates a young rift. 
A)  After rifting has been completed. 
B)  As basalts begin to fill the rift to form new ocean crust. 
C)  In the initial stages of continental rifting. 
D)  When seawater from an adjacent ocean inundates a young rift.

Question 18

At divergent zones, earthquakes commonly occur:

Accepted Answer

A)  between offset segments, where segments move in opposite directions. 
B)  beyond the ridge segments, where segments move in the same direction. 
C)  at the ridge itself, where magma rises to the surface. 
D)  at the ridge itself, where normal faulting occurs. 
A)  between offset segments, where segments move in opposite directions. 
B)  beyond the ridge segments, where segments move in the same direction. 
C)  at the ridge itself, where magma rises to the surface. 
D)  at the ridge itself, where normal faulting occurs.

Hot spots can be used as "fixed" reference points for determining plate speed and direction because:

The chimney- like structures around the "black smokers" are encrusted with:

What is a suture zone? Describe the geologic materials that might be included in the folded and faulted mountains that result from continental collisions.

All of the following are evidence of forces that drive plate movement EXCEPT:

Which of the following are conclusions that can be drawn about a plate's speed and direction of movement from a seamount chain?

List geographic examples of each stage of rifting, from the initial thinning of the crust to the closing of an ocean.

Me´langes typically contain all of the following EXCEPT:

How do oceanic hot spots and continental hot spots differ?

The breadth of an arc- trench gap at a subduction zone is determined by:

Guyots are flat primarily because:

Which of the following statements about suture zones is NOT true?

Which of the following methods of studying the sea floor incorporates energy waves generated by small targeted explosions?

List the factors that drive plate tectonic. .

Which of the following is NOT a driving mechanism of plate tectonics?

The process of backarc spreading occurs as a result of:

Old, cold oceanic lithosphere is more dense than which of the following?

In which stage of the rifting process are plate edges considered to be passive continental margins?

At divergent zones, earthquakes commonly occur:

A First Look at Planet Earth - Its Origins, Systems, and Tectonic Plates

Minerals

Igneous Rocks and Processes

Volcanoes and Volcanism

Weathering - the Breakdown of Rocks

Sedimentary Processes, Environments, and Rocks

Metamorphism and Metamorphic Rocks

Telling Time Geologically

Earth Structures - Folds, Faults, and Fabrics

Earthquakes

The Earths Interior - Whats Going on Down There

Continental Tectonics and the Formation of the Earths Continents

Mass Movement

Streams and Floods

Groundwater

Glaciers and Ice Ages

Deserts and the Work of Winds

Shores and Coastal Processes

Human Use of the Earths Resources Appendices Glossary

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Exam 12: Plate Tectonics and the Formation of the Earths Oceans

Hot spots can be used as "fixed" reference points for determining plate speed and direction because:

The chimney- like structures around the "black smokers" are encrusted with:

What is a suture zone? Describe the geologic materials that might be included in the folded and faulted mountains that result from continental collisions.

All of the following are evidence of forces that drive plate movement EXCEPT:

Which of the following are conclusions that can be drawn about a plate's speed and direction of movement from a seamount chain?

List geographic examples of each stage of rifting, from the initial thinning of the crust to the closing of an ocean.

Me´langes typically contain all of the following EXCEPT:

How do oceanic hot spots and continental hot spots differ?

The breadth of an arc- trench gap at a subduction zone is determined by:

Guyots are flat primarily because:

Which of the following statements about suture zones is NOT true?

Which of the following methods of studying the sea floor incorporates energy waves generated by small targeted explosions?

List the factors that drive plate tectonic. .

Which of the following is NOT a driving mechanism of plate tectonics?

The process of backarc spreading occurs as a result of:

Old, cold oceanic lithosphere is more dense than which of the following?

In which stage of the rifting process are plate edges considered to be passive continental margins?

At divergent zones, earthquakes commonly occur:

A First Look at Planet Earth - Its Origins, Systems, and Tectonic Plates

Minerals

Igneous Rocks and Processes

Volcanoes and Volcanism

Weathering - the Breakdown of Rocks

Sedimentary Processes, Environments, and Rocks

Metamorphism and Metamorphic Rocks

Telling Time Geologically

Earth Structures - Folds, Faults, and Fabrics

Earthquakes

The Earths Interior - Whats Going on Down There

Continental Tectonics and the Formation of the Earths Continents

Mass Movement

Streams and Floods

Groundwater

Glaciers and Ice Ages

Deserts and the Work of Winds

Shores and Coastal Processes

Human Use of the Earths Resources Appendices Glossary

Filters