Question 1

Cooler, older, oceanic lithosphere sinks into the mantle at ________.

Accepted Answer

A) subduction zones along convergent plate boundaries 
B) transform fault zones along divergent plate boundaries 
C) rift zones along mid-ocean ridges 
D) sites of long-lived, hot spot volcanism in the ocean basins 
A) subduction zones along convergent plate boundaries 
B) transform fault zones along divergent plate boundaries 
C) rift zones along mid-ocean ridges 
D) sites of long-lived, hot spot volcanism in the ocean basins

Question 2

How did Hess visualize the deep ocean trenches (e.g the Peru-Chile trench)with their earthquakes that extended hundreds of kilometres beneath the ocean floor?

Accepted Answer

The trenches were si

Question 3

What two major factors determine the width of the magnetic anomalies on the seafloor?

Accepted Answer

spreading rate (and its continuity)and h

Question 4

What is the name of the chain of volcanic islands shown in the diagram below?

Accepted Answer

The answer of What is the name of the chain...

Question 5

What were Wegener's three main lines of evidence to support his continental drift hypothesis?

Accepted Answer

any three: 
1)the fit of Afric

Question 6

Why were Wegener's continental drift ideas rejected by many contemporary and later scientists?

Accepted Answer

A) His drift mechanism seemed impossible on the basis of known physical processes. 
B) Land bridges were proven to have aided in animal and plant migrations. 
C) The ocean basins were well known to be geologically young, Mesozoic and Cenozoic features. 
D) The gravitational attractions of the Sun and Moon were not strong enough to move the continents from the southern to the northern hemisphere. 
A) His drift mechanism seemed impossible on the basis of known physical processes. 
B) Land bridges were proven to have aided in animal and plant migrations. 
C) The ocean basins were well known to be geologically young, Mesozoic and Cenozoic features. 
D) The gravitational attractions of the Sun and Moon were not strong enough to move the continents from the southern to the northern hemisphere.

Question 7

In general, seafloor sediments gradually thicken away from a mid-ocean ridge.

Accepted Answer

A) True 
 B)False

Question 8

Wegener's supercontinent that began to break up about 200 million years ago was named ________.

Accepted Answer

A) Gondwanaland 
B) Laurasia 
C) Pangaea 
D) Rodinia 
A) Gondwanaland 
B) Laurasia 
C) Pangaea 
D) Rodinia

Question 9

Deep-oceanic trenches are most abundant around the rim of the ________ ocean basin.

Accepted Answer

A) Atlantic 
B) Indian 
C) Arctic 
D) Pacific 
A) Atlantic 
B) Indian 
C) Arctic 
D) Pacific

Question 10

In the diagram below, match the letter of each illustration to the correct type of plate boundary.
A)transform
B)divergent
C)convergent

Accepted Answer

The answer of In the diagram below, match the letter...

Question 11

Plates are sliding past one another horizontally along a ________ plate boundary.

Accepted Answer

A) transform 
B) convergent 
C) divergent 
D) subduction 
A) transform 
B) convergent 
C) divergent 
D) subduction

Question 12

Once a continent starts to rift it always breaks apart making a new ocean basin.

Accepted Answer

A) True 
 B)False

Question 13

What are three mechanisms that at places contribute to plate motions?

Accepted Answer

mantle dra

Question 14

What is the inclination of Earth's magnetic field as recorded in a recent lava flow near 59 degrees north in Yukon?

Accepted Answer

A) steeply inclined and pointing north 
B) nearly vertical and pointing south 
C) nearly horizontal and pointing north 
D) nearly horizontal and pointing south 
A) steeply inclined and pointing north 
B) nearly vertical and pointing south 
C) nearly horizontal and pointing north 
D) nearly horizontal and pointing south

Question 15

What is the cause of the magmas currently erupting in the Hawaiian Islands?

Accepted Answer

A) shallow decompression melting of a fixed mantle plume, with magmas rising through the NW-moving Pacific plate 
B) flux-melting associated with subduction and a convergence between two sub-plates in the Pacific basin 
C) shallow decompression melting along a mid-Pacific ridge, spreading NE-SW 
D) shear melting associated with a mid-Pacific transform fault 
A) shallow decompression melting of a fixed mantle plume, with magmas rising through the NW-moving Pacific plate 
B) flux-melting associated with subduction and a convergence between two sub-plates in the Pacific basin 
C) shallow decompression melting along a mid-Pacific ridge, spreading NE-SW 
D) shear melting associated with a mid-Pacific transform fault

Question 16

Match the plate boundary with the appropriate phrase.
-________ the west coast of South America

Accepted Answer

A) convergent 
B) transform 
C) divergen 
A) convergent 
B) transform 
C) divergen

Question 17

A ________ is a long-lived, stationary, magma source deep in the mantle, well below the base of the lithosphere.

Accepted Answer

The answer of A ________ is a long-lived, stationary, magma...

Question 18

The Aleutians, Marianas, and Tonga Islands have formed from island arcs along ________ to ________ convergent boundaries.

Accepted Answer

The answer of The Aleutians, Marianas, and Tonga Islands have...

Question 19

What does the plate reconstruction, with the Atlantic Ocean closed up, do to the apparent polar wandering paths for Eurasia and North America, and what can we infer from this?

Accepted Answer

A) It makes them coincide, demonstrating that the opening of the Atlantic was the cause for the divergence seen today. 
B) It makes them overlap but they are still strangely curved, implying the poles have still shifted so continental drift doesn't solve anything. 
C) It indicates that the poles drift counterclockwise with time, implying Earth used to revolve the other way. 
D) It really indicates that, because opposite polarities attract, the curves became stuck together. 
A) It makes them coincide, demonstrating that the opening of the Atlantic was the cause for the divergence seen today. 
B) It makes them overlap but they are still strangely curved, implying the poles have still shifted so continental drift doesn't solve anything. 
C) It indicates that the poles drift counterclockwise with time, implying Earth used to revolve the other way. 
D) It really indicates that, because opposite polarities attract, the curves became stuck together.

Question 20

The Alpine Fault in New Zealand and the San Andreas fault in California are good examples of ________ plate boundaries.

Accepted Answer

The answer of The Alpine Fault in New Zealand and...

Cooler, older, oceanic lithosphere sinks into the mantle at ________.

How did Hess visualize the deep ocean trenches (e.g the Peru-Chile trench)with their earthquakes that extended hundreds of kilometres beneath the ocean floor?

What two major factors determine the width of the magnetic anomalies on the seafloor?

What is the name of the chain of volcanic islands shown in the diagram below?

What were Wegener's three main lines of evidence to support his continental drift hypothesis?

Why were Wegener's continental drift ideas rejected by many contemporary and later scientists?

In general, seafloor sediments gradually thicken away from a mid-ocean ridge.

Wegener's supercontinent that began to break up about 200 million years ago was named ________.

Deep-oceanic trenches are most abundant around the rim of the ________ ocean basin.

In the diagram below, match the letter of each illustration to the correct type of plate boundary. A)transform B)divergent C)convergent

Plates are sliding past one another horizontally along a ________ plate boundary.

Once a continent starts to rift it always breaks apart making a new ocean basin.

What are three mechanisms that at places contribute to plate motions?

What is the inclination of Earth's magnetic field as recorded in a recent lava flow near 59 degrees north in Yukon?

What is the cause of the magmas currently erupting in the Hawaiian Islands?

Match the plate boundary with the appropriate phrase. -________ the west coast of South America

A ________ is a long-lived, stationary, magma source deep in the mantle, well below the base of the lithosphere.

The Aleutians, Marianas, and Tonga Islands have formed from island arcs along to convergent boundaries.

What does the plate reconstruction, with the Atlantic Ocean closed up, do to the apparent polar wandering paths for Eurasia and North America, and what can we infer from this?

The Alpine Fault in New Zealand and the San Andreas fault in California are good examples of ________ plate boundaries.

An Introduction to Geology and Plate Tectonics

Minerals: The Building Blocks of Rocks

Igneous Rocks

Volcanoes and Volcanic Processes

Weathering and Soil

Sedimentary Rocks

Metamorphism and Metamorphic Rocks

Geologic Time

Crustal Deformation

Earthquakes and Earth's Interior

The Ocean Floor

Mountain Building and Continental Frameworks

Mass Wasting: The Work of Gravity

Running Water

Groundwater

Glaciers and Glaciation

Deserts and Winds

Shorelines

Mineral and Energy Resources

Filters

Exam 12: Plate Tectonics: The Framework for Modern Geology

Cooler, older, oceanic lithosphere sinks into the mantle at ________.

How did Hess visualize the deep ocean trenches (e.g the Peru-Chile trench)with their earthquakes that extended hundreds of kilometres beneath the ocean floor?

What two major factors determine the width of the magnetic anomalies on the seafloor?

What is the name of the chain of volcanic islands shown in the diagram below?

What were Wegener's three main lines of evidence to support his continental drift hypothesis?

Why were Wegener's continental drift ideas rejected by many contemporary and later scientists?

In general, seafloor sediments gradually thicken away from a mid-ocean ridge.

Wegener's supercontinent that began to break up about 200 million years ago was named ________.

Deep-oceanic trenches are most abundant around the rim of the ________ ocean basin.

In the diagram below, match the letter of each illustration to the correct type of plate boundary. A)transform B)divergent C)convergent

Plates are sliding past one another horizontally along a ________ plate boundary.

Once a continent starts to rift it always breaks apart making a new ocean basin.

What are three mechanisms that at places contribute to plate motions?

What is the inclination of Earth's magnetic field as recorded in a recent lava flow near 59 degrees north in Yukon?

What is the cause of the magmas currently erupting in the Hawaiian Islands?

Match the plate boundary with the appropriate phrase. -________ the west coast of South America

A ________ is a long-lived, stationary, magma source deep in the mantle, well below the base of the lithosphere.

The Aleutians, Marianas, and Tonga Islands have formed from island arcs along ________ to ________ convergent boundaries.

What does the plate reconstruction, with the Atlantic Ocean closed up, do to the apparent polar wandering paths for Eurasia and North America, and what can we infer from this?

The Alpine Fault in New Zealand and the San Andreas fault in California are good examples of ________ plate boundaries.

An Introduction to Geology and Plate Tectonics

Minerals: The Building Blocks of Rocks

Igneous Rocks

Volcanoes and Volcanic Processes

Weathering and Soil

Sedimentary Rocks

Metamorphism and Metamorphic Rocks

Geologic Time

Crustal Deformation

Earthquakes and Earth's Interior

The Ocean Floor

Mountain Building and Continental Frameworks

Mass Wasting: The Work of Gravity

Running Water

Groundwater

Glaciers and Glaciation

Deserts and Winds

Shorelines

Mineral and Energy Resources

Filters

The Aleutians, Marianas, and Tonga Islands have formed from island arcs along to convergent boundaries.