Question 1

The magnetic and rotational north poles on Earth are the same.

Accepted Answer

A) True 
 B)False

Question 2

What is basalt?

Accepted Answer

A)  any substance that evaporates easily and is a gas,liquid,or ice on Earth
B)  a type of rock that makes relatively low-viscosity lava
C)  a type of metal that tends to create stratovolcanoes when eruptions occur
D)  a type of mineral that is the main ingredient of sea salt
E)  another name for lavaF) A) and B)
G) B) and E)

Question 3

Which of the following describes erosion?

Accepted Answer

A)  the excavation of bowl-shaped depressions by asteroids or comets striking a planet's surface
B)  the eruption of molten rock from a planet's interior to its surface
C)  the disruption of a planet's surface by internal stresses
D)  the wearing down or building up of geological features by wind,water,ice,and other phenomena of planetary weatherE) B) and C)
F) All of the above

Question 4

Which internal energy source produces heat by converting gravitational potential energy into thermal energy?

Accepted Answer

A)  accretion
B)  differentiation
C)  radioactivity
D)  both A and B
E)  all of the aboveF) All of the above
G) D) and E)

Question 5

On average,how fast do the plates move on Earth?

Accepted Answer

A)  about 1 mile per hour
B)  a few kilometers per year
C)  a few centimeters per year
D)  a few millimeters per centuryE) A) and B)
F) A) and C)

Question 6

Very high pressures,like those found deep within planetary interiors,can compress rocks so much that they stay solid even when temperatures are high enough to melt them under ordinary conditions.

Accepted Answer

A) True 
 B)False

Question 7

The three principal sources of internal heat of terrestrial planets are

Accepted Answer

A)  conduction,differentiation,and accretion.
B)  accretion,differentiation,and radioactivity.
C)  accretion,differentiation,and eruption.
D)  convection,differentiation,and eruption.
E)  conduction,convection,and eruption.F) A) and B)
G) B) and D)

Question 8

Which of the following most likely explains why Venus does not have a global magnetic field like Earth?

Accepted Answer

A)  It does not have a metallic core.
B)  Unlike Earth,Venus does not have a liquid outer core.
C)  Its rotation is too slow.
D)  It has too thick of an atmosphere.E) A) and B)
F) All of the above

Question 9

Which of the following is an example of convection?

Accepted Answer

A)  warm air expanding and rising while cooler air contracts and fall
B)  different kinds of material separating by density,like oil and water
C)  rocks sinking in water
D)  gas bubbling upward through a liquidE) None of the above
F) B) and C)

Question 10

Deep trenches in the ocean mark places where

Accepted Answer

A)  one plate slides under another,returning older crust to the mantle.
B)  plates pull apart,leaving great rifts in the crust.
C)  hot mantle material rises upward and spreads sideways,pushing the plates apart.
D)  plates push together,creating ocean mountain chains.
E)  plates slip sideways relative to one another.F) A) and B)
G) A) and D)

Question 11

How large is an impact crater compared to the size of the impactor?

Accepted Answer

A)  the same size
B)  10-20 percent larger
C)  10 times larger
D)  100 times larger
E)  1,000 times largerF) C) and D)
G) A) and B)

Question 12

What is differentiation in planetary geology?

Accepted Answer

A)  the process by which gravity separates materials according to density
B)  the process by which different types of minerals form a conglomerate rock
C)  any process by which a planet's surface evolves differently from another planet's surface
D)  any process by which one part of a planet's surface evolves differently from another part of the same planet's surface
E)  any process by which a planet evolves differently from its moonsF) A) and C)
G) C) and E)

Question 13

Why do we think Mercury has so many tremendous cliffs?

Accepted Answer

A)  They were probably carved in Mercury's early history by running water.
B)  They were probably formed by tectonic stresses when the entire planet shrank as its core cooled.
C)  They probably formed when a series of large impacts hit Mercury one after the other.
D)  They are almost certainly volcanic in origin,carved by flowing lava.
E)  They represent one of the greatest mysteries in the solar system,as no one has suggested a reasonable hypothesis for their formation.F) A) and E)
G) B) and E)

Question 14

Heat escapes from a planet's surface into space by thermal radiation.Planets radiate almost entirely in the wavelength range of the

Accepted Answer

A)  infrared.
B)  radio.
C)  visible.
D)  ultraviolet.
E)  none of the aboveF) A) and C)
G) None of the above

Question 15

The Caloris Basin on Mercury covers a large region of the planet,but few smaller craters have formed on top of it.From this we conclude that

Accepted Answer

A)  erosion destroyed the smaller craters that formed on the basin.
B)  Mercury's atmosphere prevented smaller objects from hitting the surface.
C)  only very large impactors hit Mercury's surface in the past.
D)  the Caloris Basin formed toward the end of the solar system's period of heavy bombardment.
E)  the Caloris Basin was formed by a volcano.F) A) and E)
G) A) and C)

Question 16

Which of the following places is the result of volcanoes erupting over a hot spot in the mantle?

Accepted Answer

A)  the Himalayas
B)  the Appalachians
C)  California
D)  HawaiiE) C) and D)
F) B) and C)

Question 17

A planet is most likely to have tectonic activity if it has

Accepted Answer

A)  low surface gravity.
B)  high surface gravity.
C)  low internal temperature.
D)  high internal temperature.
E)  a dense atmosphere.F) None of the above
G) B) and D)

Question 18

How does seafloor crust differ from continental crust?

Accepted Answer

A)  Seafloor crust is thicker,older,and higher in density.
B)  Seafloor crust is thinner,younger,and higher in density.
C)  Seafloor crust is thinner,older,and lower in density.
D)  Seafloor crust is thicker,older,and lower in density.
E)  Seafloor crust is thicker,younger,and lower in density.F) A) and B)
G) C) and D)

Question 19

Which of the following describes impact cratering?

Accepted Answer

A)  the excavation of bowl-shaped depressions by asteroids or comets striking a planet's surface
B)  the eruption of molten rock from a planet's interior to its surface
C)  the disruption of a planet's surface by internal stresses
D)  the wearing down or building up of geological features by wind,water,ice,and other phenomena of planetary weatherE) A) and B)
F) B) and C)

Question 20

Suppose Mars had turned out to be significantly smaller than its current size,say about the size of our Moon.How would this have affected the number of geological features due to each of the four major geological processes?

Accepted Answer

If Mars were smaller,it would have under...

Exam 9: Planetary Geology: Earth and the Other Terrestrial Worlds

Deep trenches in the ocean mark places where

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Which of the following describes impact cratering?

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Which internal energy source produces heat by converting gravitational potential energy into thermal energy?

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How does seafloor crust differ from continental crust?

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Which of the following is an example of convection?

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The Caloris Basin on Mercury covers a large region of the planet,but few smaller craters have formed on top of it.From this we conclude that

Correct AnswerverifiedShow Answer

Why do we think Mercury has so many tremendous cliffs?

Correct AnswerverifiedShow Answer

What is differentiation in planetary geology?

Correct AnswerverifiedShow Answer

Suppose Mars had turned out to be significantly smaller than its current size,say about the size of our Moon.How would this have affected the number of geological features due to each of the four major geological processes?

Correct AnswerverifiedIf Mars were smaller,it would have under...View AnswerShow Answer

The three principal sources of internal heat of terrestrial planets are

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On average,how fast do the plates move on Earth?

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The magnetic and rotational north poles on Earth are the same.

Correct AnswerverifiedShow Answer

Which of the following describes erosion?

Correct AnswerverifiedShow Answer

How large is an impact crater compared to the size of the impactor?

Correct AnswerverifiedShow Answer

What is basalt?

Correct AnswerverifiedShow Answer

Very high pressures,like those found deep within planetary interiors,can compress rocks so much that they stay solid even when temperatures are high enough to melt them under ordinary conditions.

Correct AnswerverifiedShow Answer

Heat escapes from a planet's surface into space by thermal radiation.Planets radiate almost entirely in the wavelength range of the

Correct AnswerverifiedShow Answer

A planet is most likely to have tectonic activity if it has

Correct AnswerverifiedShow Answer

Which of the following most likely explains why Venus does not have a global magnetic field like Earth?

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Which of the following places is the result of volcanoes erupting over a hot spot in the mantle?

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If Mars were smaller,it would have under...
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