Question 1

Which of the following plates contains only oceanic crust?

Accepted Answer

A) North Atlantic Plate 
B) Australian Plate 
C) Nazca Plate 
D) African Plate 
A) North Atlantic Plate 
B) Australian Plate 
C) Nazca Plate 
D) African Plate C

Question 2

An island arc forms when there is __________ convergence.

Accepted Answer

A) ocean-continent 
B) ocean-ocean 
C) continent-continent 
D) island-continent 
A) ocean-continent 
B) ocean-ocean 
C) continent-continent 
D) island-continent B

Question 3

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 Urals 
A) the Andes 
B) the Appalachians 
C) the Himalayas 
D) the Urals A

Question 4

__________ are the most extensive mountain ranges on Earth today.

Accepted Answer

A) the Alps 
B) the Himalayas 
C) the Rockies 
D) mid-oceanic ridges 
A) the Alps 
B) the Himalayas 
C) the Rockies 
D) mid-oceanic ridges

Question 5

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. 
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.

Question 6

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. 
A) dipoles. 
B) isochrons. 
C) isograds. 
D) sutures.

Question 7

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 above 
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 above

Question 8

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

Question 9

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

Question 10

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. 
A) after Pangea. 
B) at the same time as Pangea. 
C) before Pangea. 
D) Geoscientists have no idea when Rhodinia was formed.

Question 11

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

Question 12

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 ago 
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 ago

Question 13

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 Hess 
A) Tuzo Wilson 
B) Alfred Wegener 
C) Robert Dietz 
D) Harry Hess

Question 14

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) Cascadia 
A) Marianas 
B) Andean 
C) Aleutian 
D) Cascadia

Question 15

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 islands 
A) the Andes 
B) the Cascade Range 
C) the Himalayas 
D) the Japanese islands

Question 16

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 zone 
A) continental rift 
B) spreading center 
C) mid-ocean ridge 
D) subduction zone

Question 17

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 Holmes 
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 Holmes

Question 18

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

Accepted Answer

A) earthquakes 
B) deep-sea trenches 
C) spreading centers 
D) volcanoes 
A) earthquakes 
B) deep-sea trenches 
C) spreading centers 
D) volcanoes

Question 19

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

Question 20

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 Plate 
A) the African Plate 
B) the North American Plate 
C) the Eurasian Plate 
D) the Pacific Plate

Exam 2: Plate Tectonics: The Unifying Theory

Which of the following plates contains only oceanic crust?

An island arc forms when there is __________ convergence.

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

__________ are the most extensive mountain ranges on Earth today.

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

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

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

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

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

Rhodinia is a supercontinent that formed

The width of seafloor isochrons is directly related to

When was the supercontinent of Pangaea assembled?

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

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

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

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

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

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

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

Which of the following plates is moving the fastest?

The Earth System

Earth Materials: Minerals and Rocks

Igneous Rocks: Solids From Melts

Sedimentation: Rocks Formed by Surface Processes

Metamorphism: Alteration of Rocks by Temperature and Pressure

Deformation: Modification of Rocks by Folding and Fracturing

Clocks in Rocks: Timing the Geologic Period

Early History of the Terrestrial Planets

History of the Continents

Geobiology: Life Interacts With Earth

Volcanoes

Earthquakes

Exploring Earths Interior

The Climate System

Weathering,erosion,and Mass Wasting: Interactions Between the Climate and Plate Tectonic Systems

The Hydrologic Cycle and Groundwater

Stream Transport: From Mountains to Oceans

Winds and Deserts

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Glaciers: the Work of Ice

Landscapes: Tectonic and Climate Interaction

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