Question 1

In contrast to the Earth and Mercury,the fact that the Earth's moon has no magnetic field implies that

Accepted Answer

A)  the moon is spinning too slowly to produce a magnetic field. 
B)  the interior of the moon is too hot to produce a magnetic field. 
C)  the crust of the moon is so thick that the magnetic field can not get out of the interior. 
D)  the moon's core contains little if any molten iron. 
E)  the moon is moving farther from Earth. 
A)  the moon is spinning too slowly to produce a magnetic field. 
B)  the interior of the moon is too hot to produce a magnetic field. 
C)  the crust of the moon is so thick that the magnetic field can not get out of the interior. 
D)  the moon's core contains little if any molten iron. 
E)  the moon is moving farther from Earth.

Question 2

The Earth's moon is less dense than Mercury.

Accepted Answer

A) True 
 B)False

Question 3

The fission hypothesis (i.e.,that the Moon broke off from the Earth early in its history)has been accepted by astronomers as the correct explanation for the origin of the Moon.

Accepted Answer

A) True 
 B)False

Question 4

As the moon revolves around Earth,

Accepted Answer

A)  it keeps one side always towards the sun. 
B)  it rotates on its axis about once every earth day. 
C)  it keeps one side always toward Earth. 
D)  the moon makes two rotations on its axis for every revolution. 
E)  the moon makes one rotation on its axis for every two revolutions. 
A)  it keeps one side always towards the sun. 
B)  it rotates on its axis about once every earth day. 
C)  it keeps one side always toward Earth. 
D)  the moon makes two rotations on its axis for every revolution. 
E)  the moon makes one rotation on its axis for every two revolutions.

Question 5

Which of the terrestrial planets has lobate scarps seen as features on its surface?

Accepted Answer

A)  Mercury 
B)  Venus 
C)  Earth 
D)  Mars 
A)  Mercury 
B)  Venus 
C)  Earth 
D)  Mars

Question 6

How does the large-impact hypothesis explain why the Moon is poor in heavy elements like iron?

Accepted Answer

A)  The collision occurred too close to the Sun for heavy elements to exist. 
B)  The impact occurred after Earth had differentiated heavy elements to its center. 
C)  The collision blew away most of the heavy elements into space. 
D)  Most of the heavy elements were vaporized in the collision. 
A)  The collision occurred too close to the Sun for heavy elements to exist. 
B)  The impact occurred after Earth had differentiated heavy elements to its center. 
C)  The collision blew away most of the heavy elements into space. 
D)  Most of the heavy elements were vaporized in the collision.

Question 7

On the moon,the maria are younger than the highlands.

Accepted Answer

A) True 
 B)False

Question 8

Compared to being on the Earth,a person will weigh about _____ as much on the moon.

Accepted Answer

A)  1/5=(1/80)/(1/4)2 
B)  5 times = (80)/42. 
C)  1/80 
D)  80 times 
A)  1/5=(1/80)/(1/4)2 
B)  5 times = (80)/42. 
C)  1/80 
D)  80 times

Question 9

Mercury has a(n)____________________ core while the Earth's moon does not.

Accepted Answer

The answer of Mercury has a(n)____________________ core while the Earth's...

Question 10

The surface of Mercury is difficult to map from Earth because

Accepted Answer

A)  it is hidden beneath thick clouds. 
B)  it is never closer than 8 AU to Earth. 
C)  it is always near the sun. 
D)  all of the above 
E)  none of the above 
A)  it is hidden beneath thick clouds. 
B)  it is never closer than 8 AU to Earth. 
C)  it is always near the sun. 
D)  all of the above 
E)  none of the above

Question 11

Mercury has a mass of 3.3*1023 kg and a radius of 2.4*106 m.The gravitational constant is 6.7*10 - 11 N.m2/kg2.What is Mercury's escape velocity?

Accepted Answer

A)  3,000 km/s 
B)  4.3 km/s 
C)  9.2*106 m/s 
D)  1.8*107 m/s 
E)  11.2 km/s 
A)  3,000 km/s 
B)  4.3 km/s 
C)  9.2*106 m/s 
D)  1.8*107 m/s 
E)  11.2 km/s

Question 12

We know Mercury must have a large metal core because it has a high density.

Accepted Answer

A) True 
 B)False

Question 13

Which hypothesis,concerning the formation of the moon,makes predictions that best fit the observed lunar data?

Accepted Answer

A)  the large impact hypothesis 
B)  the fission hypothesis 
C)  the capture hypothesis 
D)  the co-accretion hypothesis 
E)  the regolith hypothesis 
A)  the large impact hypothesis 
B)  the fission hypothesis 
C)  the capture hypothesis 
D)  the co-accretion hypothesis 
E)  the regolith hypothesis

Question 14

That Mercury has a large iron core is evidenced by

Accepted Answer

A)  the large lobate scarps. 
B)  the large mean density of Mercury. 
C)  the lava flows near Caloris Basin. 
D)  all of the above 
E)  none of the above 
A)  the large lobate scarps. 
B)  the large mean density of Mercury. 
C)  the lava flows near Caloris Basin. 
D)  all of the above 
E)  none of the above

Question 15

____________________ protects the Earth from small meteorites while the Earth's moon is ____________________.

Accepted Answer

The atmosp

Question 16

Mercury is the only terrestrial planet without a moon.

Accepted Answer

A) True 
 B)False

Question 17

The Moon has a diameter of about 3500 km and the Earth 13,000 km.This is about _____ the radial size of the Earth..

Accepted Answer

A)  1/80 
B)  80x 
C)  4x 
D)  1/4 
A)  1/80 
B)  80x 
C)  4x 
D)  1/4

Question 18

The escape velocity of the Earth's moon is ____ that of the Earth.

Accepted Answer

A)  greater than 
B)  less than 
C)  equal to 
A)  greater than 
B)  less than 
C)  equal to

Question 19

Mercury's smooth plains are probably the oldest parts of the crust.

Accepted Answer

A) True 
 B)False

Question 20

____________________ are long winding channels near the edges of maria that are thought to have been made by lava flows.

Accepted Answer

The answer of ____________________ are long winding channels near the...

Exam 21: The Moon and Mercury: Comparing Airless Worlds

In contrast to the Earth and Mercury,the fact that the Earth's moon has no magnetic field implies that

The Earth's moon is less dense than Mercury.

The fission hypothesis (i.e.,that the Moon broke off from the Earth early in its history)has been accepted by astronomers as the correct explanation for the origin of the Moon.

As the moon revolves around Earth,

Which of the terrestrial planets has lobate scarps seen as features on its surface?

How does the large-impact hypothesis explain why the Moon is poor in heavy elements like iron?

On the moon,the maria are younger than the highlands.

Compared to being on the Earth,a person will weigh about _____ as much on the moon.

Mercury has a(n)____________________ core while the Earth's moon does not.

The surface of Mercury is difficult to map from Earth because

Mercury has a mass of 3.3*1023 kg and a radius of 2.4*106 m.The gravitational constant is 6.7*10 - 11 N.m2/kg2.What is Mercury's escape velocity?

We know Mercury must have a large metal core because it has a high density.

Which hypothesis,concerning the formation of the moon,makes predictions that best fit the observed lunar data?

That Mercury has a large iron core is evidenced by

____________________ protects the Earth from small meteorites while the Earth's moon is ____________________.

Mercury is the only terrestrial planet without a moon.

The Moon has a diameter of about 3500 km and the Earth 13,000 km.This is about _____ the radial size of the Earth..

The escape velocity of the Earth's moon is ____ that of the Earth.

Mercury's smooth plains are probably the oldest parts of the crust.

____________________ are long winding channels near the edges of maria that are thought to have been made by lava flows.

Here and Now

A Users Guide to the Sky

Cycles of the Moon

The Origin of Modern Astronomy

Gravity

Light and Telescopes

Atoms and Spectra

The Sun

The Family of Stars

The Interstellar Medium

The Formation and Structure of Stars

Stellar Evolution

The Deaths of Stars

Neutron Stars and Black Holes

The Milky Way Galaxy

Galaxies

Active Galaxies and Supermassive Black Holes

Modern Cosmology

The Origin of the Solar System

Earth: the Standard of Comparative Planetology

Venus and Mars

Jupiter and Saturn

Uranus,neptune,and the Kuiper Belt

Meteorites,asteroids,and Comets

Astrobiology: Life on Other Worlds

Filters

Mercury has a mass of 3.310²³ kg and a radius of 2.410⁶ m.The gravitational constant is 6.7*10 ^- ¹¹ N.m²/kg².What is Mercury's escape velocity?

protects the Earth from small meteorites while the Earth's moon is .