Question 1

If the polar ice decreases, what would happen, and why?

Accepted Answer

A)  warming, because more sunlight is reflected
B)  warming, because more sunlight is absorbed
C)  cooling, because more sunlight is reflected
D)  cooling, because melted ice cools things offE) B) and C)
F) B) and D)

Question 2

Earth is habitable because of the greenhouse effect.

Accepted Answer

A) True 
 B)False

Question 3

What are the conditions necessary for a terrestrial planet to have a strong magnetic field?

Accepted Answer

A)  a rocky mantle only
B)  a molten metallic core only
C)  fast rotation only
D)  both a molten metallic core and reasonably fast rotation
E)  both a metal core and a rocky mantleF) A) and B)
G) All of the above

Question 4

What do we mean when we say that the terrestrial worlds underwent differentiation?

Accepted Answer

A)  They lost interior heat to outer space.
B)  Their surfaces show a variety of different geological features resulting from different geological processes.
C)  When their interiors were molten, denser materials sank toward their centers and lighter materials rose toward their surfaces.
D)  The five terrestrial worlds all started similarly but ended up looking quite different.E) A) and D)
F) B) and D)

Question 5

Earth outgassed as much carbon dioxide as Venus, but it is locked up in the oceans and rocks.

Accepted Answer

A) True 
 B)False

Question 6

What kind of thermal radiation does the Earth emit?

Accepted Answer

A)  infrared light
B)  visible light
C)  visible and ultraviolet light
D)  infrared and visible light
E)  infrared, visible, and ultraviolet lightF) All of the above
G) C) and D)

Question 7

How does the size of a planet determine its internal temperature?

Accepted Answer

Size is the most important fac...

Question 8

The cores of the terrestrial worlds are made mostly of metal because .

Accepted Answer

A)  metals sunk to the centers a long time ago when the interiors were molten throughout
B)  over billions of years, convection gradually brought dense metals downward to the core
C)  the core contained lots of radioactive elements that decayed into metals
D)  the terrestrial worlds as a whole are made mostly of metalE) All of the above
F) C) and D)

Question 9

Deep trenches in the ocean mark places where

Accepted Answer

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

Question 10

Which of the following best describes the lunar maria?

Accepted Answer

A)  frozen oceans of liquid water on the Moon
B)  mountainous regions on the Moon
C)  densely cratered regions on the Moon
D)  relatively smooth, flat plains on the MoonE) C) and D)
F) A) and B) D

Question 11

Why is Mars so much colder than the Earth?

Accepted Answer

A)  because Mars is farther from the Sun
B)  because Mars has a much thinner, more diffuse atmosphere
C)  because Mars has a little less gravity than the Earth
D)  because the albedo of Mars is higher than the EarthE) B) and C)
F) A) and C)

Question 12

What are some of the things that make Earth unique among the terrestrial planets?

Accepted Answer

It is the only planet with an oxygen- ri...

Question 13

Describe the three sources of internal heat of the terrestrial planets.

Accepted Answer

Accretion is heat generated by the agglo...

Question 14

Under what circumstances can differentiation occur in a planet?

Accepted Answer

A)  The planet must have an atmosphere.
B)  The planet must be made of both metal and rock.
C)  The planet must have a molten interior.
D)  The planet must have a rocky surface.
E)  The planet must be geologically active, that is, have volcanoes, planetquakes, and erosion from weather.F) All of the above
G) B) and D)

Question 15

Evidence for Life: Imagine that recent advances in technology have allowed the discovery of several very low mass (much less than the mass of Jupiter)planets around nearby, Sun- like stars. Assume all that is known about these planets is their mass, their size, and the characteristics of their orbits (i.e., semi- major axis and eccentricity). You are asked to speculate on whether or not life (similar to that on Earth)might exist on these planets. How would you answer this question? You are then asked what new observations we might make to help settle this question. How would you respond?

Accepted Answer

The discovery of low mass planets around...

Question 16

Which two geological processes appear to have been most important in shaping the present surface of Venus?

Accepted Answer

A)  impacts and tectonics
B)  volcanoes and tectonics
C)  tectonics and erosion
D)  volcanoes and erosion
E)  impacts and volcanoesF) C) and D)
G) A) and D) B

Question 17

Why does Mars have more extreme seasons than Earth?

Accepted Answer

A)  because it has a more eccentric orbit
B)  because it is farther from the Sun
C)  because it has more carbon dioxide in its atmosphere
D)  because it has a larger axis tilt
E)  all of the aboveF) D) and E)
G) All of the above

Question 18

Which of the following show evidence of ancient river beds?

Accepted Answer

A)  Mercury
B)  Venus
C)  the Moon
D)  Mars
E)  all of the aboveF) B) and E)
G) None of the above

Question 19

The presence of oxygen and ozone in Earth's atmosphere can be explained only through biology.

Accepted Answer

A) True 
 B)False  True

Question 20

Which of the following statements about the greenhouse effect is true?

Accepted Answer

A)  A weak greenhouse effect operates on Mars.
B)  The burning of fossil fuels increases the greenhouse effect on Earth because of the release of carbon dioxide.
C)  One result of an increased greenhouse effect on Earth may be an increased number of severe storms.
D)  Without the naturally occurring greenhouse effect, Earth would be too cold to have liquid oceans.
E)  All of the above are true.F) A) and E)
G) B) and D)

Exam 7: Earth and the Terrestrial Worlds

If the polar ice decreases, what would happen, and why?

Correct Answer
verified

Earth is habitable because of the greenhouse effect.

Correct Answer
verified

What are the conditions necessary for a terrestrial planet to have a strong magnetic field?

Correct Answer
verified

What do we mean when we say that the terrestrial worlds underwent differentiation?

Correct Answer
verified

Earth outgassed as much carbon dioxide as Venus, but it is locked up in the oceans and rocks.

Correct Answer
verified

What kind of thermal radiation does the Earth emit?

Correct Answer
verified

How does the size of a planet determine its internal temperature?

Correct Answer
verified
Size is the most important fac...
View Answer

The cores of the terrestrial worlds are made mostly of metal because .

Correct Answer
verified

Deep trenches in the ocean mark places where

Correct Answer
verified

Which of the following best describes the lunar maria?

Correct Answer
verified
D

Why is Mars so much colder than the Earth?

Correct Answer
verified

What are some of the things that make Earth unique among the terrestrial planets?

Correct Answer
verified
It is the only planet with an oxygen- ri...
View Answer

Describe the three sources of internal heat of the terrestrial planets.

Correct Answer
verified
Accretion is heat generated by the agglo...
View Answer

Under what circumstances can differentiation occur in a planet?

Correct Answer
verified

Correct Answer
Answered by ExamLex AI
The discovery of low mass planets around...
View Answer

Which two geological processes appear to have been most important in shaping the present surface of Venus?

Correct Answer
verified
B

Why does Mars have more extreme seasons than Earth?

Correct Answer
verified

Which of the following show evidence of ancient river beds?

Correct Answer
verified

The presence of oxygen and ozone in Earth's atmosphere can be explained only through biology.

Correct Answer
verified
True

Which of the following statements about the greenhouse effect is true?

Correct Answer
verified

Exam 7: Earth and the Terrestrial Worlds

If the polar ice decreases, what would happen, and why?

Correct AnswerverifiedShow Answer

Earth is habitable because of the greenhouse effect.

Correct AnswerverifiedShow Answer

What are the conditions necessary for a terrestrial planet to have a strong magnetic field?

Correct AnswerverifiedShow Answer

What do we mean when we say that the terrestrial worlds underwent differentiation?

Correct AnswerverifiedShow Answer

Earth outgassed as much carbon dioxide as Venus, but it is locked up in the oceans and rocks.

Correct AnswerverifiedShow Answer

What kind of thermal radiation does the Earth emit?

Correct AnswerverifiedShow Answer

How does the size of a planet determine its internal temperature?

Correct AnswerverifiedSize is the most important fac...View AnswerShow Answer

The cores of the terrestrial worlds are made mostly of metal because .

Correct AnswerverifiedShow Answer

Deep trenches in the ocean mark places where

Correct AnswerverifiedShow Answer

Which of the following best describes the lunar maria?

Correct AnswerverifiedD

Why is Mars so much colder than the Earth?

Correct AnswerverifiedShow Answer

What are some of the things that make Earth unique among the terrestrial planets?

Correct AnswerverifiedIt is the only planet with an oxygen- ri...View AnswerShow Answer

Describe the three sources of internal heat of the terrestrial planets.

Correct AnswerverifiedAccretion is heat generated by the agglo...View AnswerShow Answer

Under what circumstances can differentiation occur in a planet?

Correct AnswerverifiedShow Answer

Correct AnswerAnswered by ExamLex AIThe discovery of low mass planets around...View AnswerShow Answer

Which two geological processes appear to have been most important in shaping the present surface of Venus?

Correct AnswerverifiedB

Why does Mars have more extreme seasons than Earth?

Correct AnswerverifiedShow Answer

Which of the following show evidence of ancient river beds?

Correct AnswerverifiedShow Answer

The presence of oxygen and ozone in Earth's atmosphere can be explained only through biology.

Correct AnswerverifiedTrue

Which of the following statements about the greenhouse effect is true?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Size is the most important fac...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
D

Correct Answer
verified

Correct Answer
verified
It is the only planet with an oxygen- ri...
View Answer

Correct Answer
verified
Accretion is heat generated by the agglo...
View Answer

Correct Answer
verified

Correct Answer
Answered by ExamLex AI
The discovery of low mass planets around...
View Answer

Correct Answer
verified
B

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
True

Correct Answer
verified