Question 1

Earth's magnetic field has reversed nine times in the last four million years.

Accepted Answer

A) True 
 B)False

Question 2

The major rocks of Earth's crust are classified into principal types based on

Accepted Answer

A)   element composition.
B)   mineral composition.
C)   three specific rock-forming processes; i.e., the manner in which they formed.
D)   relative and absolute locations.E) A) and B)
F) B) and C)

Question 3

The Moho separates the uppermost mantle from the crust.

Accepted Answer

A) True 
 B)False

Question 4

The core comprises 1/3ʳᵈ of the Earth's mass, but only 1/6ᵗʰ of its volume.

Accepted Answer

A) True 
 B)False

Question 5

Which part of Earth is primarily responsible for Earth's magnetic field? Why? What are the characteristics of magnetic reversals? How often do they occur? When will the next one occur, and what will happen when it does?

Accepted Answer

The Earth's magnetism is generated in th...

Question 6

Obsidian is an igenous rock with a glassy appearance and minimal crystal growth. What accounts for this?

Accepted Answer

A)   Obsidian is an intrusive igneous rock that cooled slowly beneath the Earth's surface, result in little crystal growth.
B)   Obsidian is an extrusive igneous rock that cooled slowly on the Earth surface, resulting in little crystal growth.
C)   Obsidian is an extrusive igneous rock that cooled very slowly on the Earth surface, resulting in little crystal growth.
D)   Obsidian is an intrusive igneous rock that cooled rapidly beneath the Earth's surface, result in little crystal growth.E) A) and C)
F) B) and C)

Question 7

Which of the following is an exogenic process?

Accepted Answer

A)   earthquakes
B)   volcanism
C)   flows of heat and materials in the mantle
D)   weatheringE) B) and C)
F) A) and D)

Question 8

The dominant element in continental crust are

Accepted Answer

A)   silica and aluminum.
B)   silica and magnesium.
C)   magnesium and aluminum.
D)   potassium and iron.E) A) and B)
F) None of the above

Question 9

Convergent plate boundaries occur in areas of seafloor spreading.

Accepted Answer

A) True 
 B)False

Question 10

Intrusive igeneous cooled and hardened ________ the Earth's surface, resulting in ________ grained rocks.

Accepted Answer

A)   beneath; finer
B)   beneath; coarser
C)   at; finer
D)   at; coarserE) B) and C)
F) A) and D)

Question 11

Felsic igneous rock, such as granite and rhyolite,

Accepted Answer

A)   have dark coloration.
B)   are not resistant to weathering.
C)   have a high melting temperature.
D)   are high in silicate minerals.E) B) and C)
F) C) and D)

Question 12

The ________ drives the endogenic processes of the rock cycle.

Accepted Answer

A)   atmospheric circulation
B)   rock cycle
C)   hydrologic cycle
D)   tectonic cycleE) None of the above
F) A) and D) C

Question 13

Draw or verbally depict a cross-section of Earth from the center to the surface including all of its major components. Include important physical characteristics, such as the thickness of the layer, the nature of the rock, approximate temperature, density, and mineral types.

Accepted Answer

Figure 12.2 is the best guide for answer...

Question 14

A rock transformed from any other rock through extreme heat and or pressure is referred to as

Accepted Answer

A)   sedimentary.
B)   metamorphic.
C)   igneous.
D)   ancient.E) C) and D)
F) B) and C) B

Question 15

The geologic cycle is fueled by

Accepted Answer

A)   solar energy.
B)   the Earth's internal heat.
C)   both solar energy and the Earth's internal heat.
D)   neither solar energy and the Earth's internal heat.E) None of the above
F) A) and D) C

Question 16

The relative age of geologic features is ascertained through the use of radiometric dating.

Accepted Answer

A) True 
 B)False

Question 17

True north is a fixed geographic point.

Accepted Answer

A) True 
 B)False

Question 18

Which of the following lists, in proper sequential order, the steps leading to the formation of clastic sedimentary rock?

Accepted Answer

A)   erosion, transportation, deposition, cementation
B)   erosion, deposition, transportation, cementation
C)   erosion, transportation, deposition, metamorphism
D)   precipitation, settling, compaction, cementationE) A) and B)
F) A) and C)

Question 19

The presence of 180-million-year-old salt domes in the Gulf Coast region of the United States indicates that

Accepted Answer

A)   the area was once volcanically active.
B)   the area was subjected to plate collisions which caused metamorphism to occur.
C)   subsidence is now occurring due to the withdrawal of magma from the region.
D)   a sea used to cover the area but subsequently evaporated.E) None of the above
F) A) and D)

Question 20

Which of the following is correct in regards to the geologic time scale?

Accepted Answer

A)   An epoch is composed of one or more periods.
B)   The largest defined unit is an eon or, according to some, a supereon.
C)   An era is the smallest unit of geologic time.
D)   Every period is composed of 2 epochs.E) B) and C)
F) B) and D)

Exam 12: The Dynamic Planet

Earth's magnetic field has reversed nine times in the last four million years.

Correct AnswerverifiedShow Answer

The major rocks of Earth's crust are classified into principal types based on

Correct AnswerverifiedShow Answer

The Moho separates the uppermost mantle from the crust.

Correct AnswerverifiedShow Answer

The core comprises 1/3ʳᵈ of the Earth's mass, but only 1/6ᵗʰ of its volume.

Correct AnswerverifiedShow Answer

Which part of Earth is primarily responsible for Earth's magnetic field? Why? What are the characteristics of magnetic reversals? How often do they occur? When will the next one occur, and what will happen when it does?

Correct AnswerverifiedThe Earth's magnetism is generated in th...View AnswerShow Answer

Obsidian is an igenous rock with a glassy appearance and minimal crystal growth. What accounts for this?

Correct AnswerverifiedShow Answer

Which of the following is an exogenic process?

Correct AnswerverifiedShow Answer

The dominant element in continental crust are

Correct AnswerverifiedShow Answer

Convergent plate boundaries occur in areas of seafloor spreading.

Correct AnswerverifiedShow Answer

Intrusive igeneous cooled and hardened ________ the Earth's surface, resulting in ________ grained rocks.

Correct AnswerverifiedShow Answer

Felsic igneous rock, such as granite and rhyolite,

Correct AnswerverifiedShow Answer

The ________ drives the endogenic processes of the rock cycle.

Correct AnswerverifiedC

Draw or verbally depict a cross-section of Earth from the center to the surface including all of its major components. Include important physical characteristics, such as the thickness of the layer, the nature of the rock, approximate temperature, density, and mineral types.

Correct AnswerverifiedFigure 12.2 is the best guide for answer...View AnswerShow Answer

A rock transformed from any other rock through extreme heat and or pressure is referred to as

Correct AnswerverifiedB

The geologic cycle is fueled by

Correct AnswerverifiedC

The relative age of geologic features is ascertained through the use of radiometric dating.

Correct AnswerverifiedShow Answer

True north is a fixed geographic point.

Correct AnswerverifiedShow Answer

Which of the following lists, in proper sequential order, the steps leading to the formation of clastic sedimentary rock?

Correct AnswerverifiedShow Answer

The presence of 180-million-year-old salt domes in the Gulf Coast region of the United States indicates that

Correct AnswerverifiedShow Answer

Which of the following is correct in regards to the geologic time scale?

Correct AnswerverifiedShow Answer

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The Earth's magnetism is generated in th...
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Intrusive igeneous cooled and hardened the Earth's surface, resulting in grained rocks.

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C

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Figure 12.2 is the best guide for answer...
View Answer

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B

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C

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