Question 1

The driving mechanism of plate tectonics is not well understood, but the two proposed models both involve___________ ___________ ___________ .

Accepted Answer

thermal convection cells

Question 2

If the continents were once joined together, rocks and mountain ranges on the margins of each

Accepted Answer

A)  should have formed under the same conditions. 
B)  should have formed in the same sequences. 
C)  should have formed at the same time. 
D)  should have the same structural trends and forces. 
E)  all of the above. 
A)  should have formed under the same conditions. 
B)  should have formed in the same sequences. 
C)  should have formed at the same time. 
D)  should have the same structural trends and forces. 
E)  all of the above. E

Question 3

What are the three types of convergent boundaries?

Accepted Answer

continent-continent, continent-oceanic, oceanic-oceanic

Question 4

Besides Earth, name three of the planets which are known to have had a history of volcanism and earthquakes.

Accepted Answer

Mercury, V

Question 5

The supercontinent cycle hypothesis refers to the cyclical formation and breakup of supercontinents over a period of 500-600 million years.

Accepted Answer

A) True 
 B)False

Question 6

The forces operating at continent-continent convergent plate boundaries are

Accepted Answer

A)  tensional. 
B)  extensional. 
C)  lateral shearing (transform). 
D)  compressional. 
E)  compressional and tensional. 
A)  tensional. 
B)  extensional. 
C)  lateral shearing (transform). 
D)  compressional. 
E)  compressional and tensional.

Question 7

Tectonic plates interact along both passive and active continental margins.

Accepted Answer

A) True 
 B)False

Question 8

Studies of paleomagnetism showed that

Accepted Answer

A)  the northern and southern hemispheres had many times reversed position. 
B)  the ocean basins were young. 
C)  each continent had once had its own magnetic north pole. 
D)  the continents remained fixed and the north magnetic pole has moved. 
E)  all of the above 
A)  the northern and southern hemispheres had many times reversed position. 
B)  the ocean basins were young. 
C)  each continent had once had its own magnetic north pole. 
D)  the continents remained fixed and the north magnetic pole has moved. 
E)  all of the above

Question 9

Pangaea began to fragment in the___________ Period.

Accepted Answer

The answer of Pangaea began to fragment in the___________ Period....

Question 10

Which of the planets may have plate tectonics comparable to that of Earth?

Accepted Answer

Venus, because there are folde

Question 11

The idea that the position of continents has not been static over time is a relatively new concept, since the 1960's.

Accepted Answer

A) True 
 B)False

Question 12

What present-day mountains of the eastern United States and Canada originally formed as an interior orogen?

Accepted Answer

the Appala

Question 13

Although the physical evidence for continental drift was substantial, the hypothesis lacked a viable mechanism for producing continental movement.

Accepted Answer

A) True 
 B)False

Question 14

Why did glacial deposits provide strong evidence of the existence of Gondwana?

Accepted Answer

A single continent in high southern lati

Question 15

Briefly explain the thermal convection cell mechanism for plate motion.

Accepted Answer

The convection cell model of plate motio

Question 16

What observations indicate that oceanic ridges are geologically very active?

Accepted Answer

their high heat flow

Question 17

In the plate tectonic model, what three kinds of boundaries can there be between adjacent plates?

Accepted Answer

(in any or

Question 18

At which type(s) of boundary(-ies) do we have earthquakes?

Accepted Answer

The answer of At which type(s) of boundary(-ies) do we...

Question 19

What are four types of metallic ore deposits which have formed or may currently be forming at divergent boundaries?

Accepted Answer

any four of the foll

Question 20

What is an orogen?

Accepted Answer

a linear part of Ear

The driving mechanism of plate tectonics is not well understood, but the two proposed models both involve_____ _ _______ .

If the continents were once joined together, rocks and mountain ranges on the margins of each

What are the three types of convergent boundaries?

Besides Earth, name three of the planets which are known to have had a history of volcanism and earthquakes.

The supercontinent cycle hypothesis refers to the cyclical formation and breakup of supercontinents over a period of 500-600 million years.

The forces operating at continent-continent convergent plate boundaries are

Tectonic plates interact along both passive and active continental margins.

Studies of paleomagnetism showed that

Pangaea began to fragment in the___________ Period.

Which of the planets may have plate tectonics comparable to that of Earth?

The idea that the position of continents has not been static over time is a relatively new concept, since the 1960's.

What present-day mountains of the eastern United States and Canada originally formed as an interior orogen?

Although the physical evidence for continental drift was substantial, the hypothesis lacked a viable mechanism for producing continental movement.

Why did glacial deposits provide strong evidence of the existence of Gondwana?

Briefly explain the thermal convection cell mechanism for plate motion.

What observations indicate that oceanic ridges are geologically very active?

In the plate tectonic model, what three kinds of boundaries can there be between adjacent plates?

At which type(s) of boundary(-ies) do we have earthquakes?

What are four types of metallic ore deposits which have formed or may currently be forming at divergent boundaries?

What is an orogen?

Understanding Earth: A Dynamic and Evolving Planet

Minerals-The Building Blocks of Rocks

Igneous Rocks and Intrusive Igneous Activity

Volcanoes and Volcanism

Weathering, Erosion, and Soil

Sediment and Sedimentary Rocks

Metamorphism and Metamorphic Rocks

Geologic Time: Concepts and Principles

Earthquakes

Earths Interior

The Seafloor

Deformation, Mountain Building, and the Evolution of Continents

Mass Wasting

Running Water

Groundwater

Glaciers and Glaciation

The Work of Winds and Deserts

Shorelines and Shoreline Processes

Geology and Humanity

Filters

Exam 2: Plate Tectonics: A Unifying Theory

The driving mechanism of plate tectonics is not well understood, but the two proposed models both involve___________ ___________ ___________ .

If the continents were once joined together, rocks and mountain ranges on the margins of each

What are the three types of convergent boundaries?

Besides Earth, name three of the planets which are known to have had a history of volcanism and earthquakes.

The supercontinent cycle hypothesis refers to the cyclical formation and breakup of supercontinents over a period of 500-600 million years.

The forces operating at continent-continent convergent plate boundaries are

Tectonic plates interact along both passive and active continental margins.

Studies of paleomagnetism showed that

Pangaea began to fragment in the___________ Period.

Which of the planets may have plate tectonics comparable to that of Earth?

The idea that the position of continents has not been static over time is a relatively new concept, since the 1960's.

What present-day mountains of the eastern United States and Canada originally formed as an interior orogen?

Although the physical evidence for continental drift was substantial, the hypothesis lacked a viable mechanism for producing continental movement.

Why did glacial deposits provide strong evidence of the existence of Gondwana?

Briefly explain the thermal convection cell mechanism for plate motion.

What observations indicate that oceanic ridges are geologically very active?

In the plate tectonic model, what three kinds of boundaries can there be between adjacent plates?

At which type(s) of boundary(-ies) do we have earthquakes?

What are four types of metallic ore deposits which have formed or may currently be forming at divergent boundaries?

What is an orogen?

Understanding Earth: A Dynamic and Evolving Planet

Minerals-The Building Blocks of Rocks

Igneous Rocks and Intrusive Igneous Activity

Volcanoes and Volcanism

Weathering, Erosion, and Soil

Sediment and Sedimentary Rocks

Metamorphism and Metamorphic Rocks

Geologic Time: Concepts and Principles

Earthquakes

Earths Interior

The Seafloor

Deformation, Mountain Building, and the Evolution of Continents

Mass Wasting

Running Water

Groundwater

Glaciers and Glaciation

The Work of Winds and Deserts

Shorelines and Shoreline Processes

Geology and Humanity

Filters

The driving mechanism of plate tectonics is not well understood, but the two proposed models both involve_____ _ _______ .