Question 1

____________________ basin is the largest known impact crater on Mercury.

Accepted Answer

Caloris

Question 2

Slow surface evolution on the moon is limited to

Accepted Answer

A)  low density masses of rock rising from the interior. 
B)  low level meteorite impacts. 
C)  small moonquakes disturbing the surface features. 
D)  motion along a network of small faults. 
E)  all of the above 
A)  low density masses of rock rising from the interior. 
B)  low level meteorite impacts. 
C)  small moonquakes disturbing the surface features. 
D)  motion along a network of small faults. 
E)  all of the above B

Question 3

Slow surface evolution on Mercury is due to

Accepted Answer

A)  micrometeorite impacts. 
B)  intense cycles of high and low temperature that weakens the surface rocks. 
C)  plate tectonics. 
D)  all of the above 
E)  a and b 
A)  micrometeorite impacts. 
B)  intense cycles of high and low temperature that weakens the surface rocks. 
C)  plate tectonics. 
D)  all of the above 
E)  a and b E

Question 4

The airless and inert nature of the Earth's moon results in ____ craters per unit area as on Earth.

Accepted Answer

A)  more 
B)  fewer 
C)  an equal number of 
A)  more 
B)  fewer 
C)  an equal number of

Question 5

The time it takes Mercury to complete a solar day (the time from sunrise to sunrise)

Accepted Answer

A)  is equal to two revolutions of Mercury around the sun. 
B)  is about one earth day. 
C)  depends on the season of the year. 
D)  is equal to one revolution of Mercury around the sun. 
E)  is about one earth year. 
A)  is equal to two revolutions of Mercury around the sun. 
B)  is about one earth day. 
C)  depends on the season of the year. 
D)  is equal to one revolution of Mercury around the sun. 
E)  is about one earth year.

Question 6

The surface temperature of Mercury is

Accepted Answer

A)  about equal to that of Earth's deserts. 
B)  about equal to that on the bright side of the moon. 
C)  nearly equal to the surface temperature of the sun. 
D)  about the same on the day and night sides of the planet. 
E)  none of the above 
A)  about equal to that of Earth's deserts. 
B)  about equal to that on the bright side of the moon. 
C)  nearly equal to the surface temperature of the sun. 
D)  about the same on the day and night sides of the planet. 
E)  none of the above

Question 7

The oldest parts of the surface of Mercury are believed to be

Accepted Answer

A)  the intercrater plains. 
B)  the smooth plains. 
C)  lava flows from Caloris Basin. 
D)  ejecta. 
E)  vesicular rocks. 
A)  the intercrater plains. 
B)  the smooth plains. 
C)  lava flows from Caloris Basin. 
D)  ejecta. 
E)  vesicular rocks.

Question 8

The ____________________ hypothesis for the formation of the moon suggests that the moon and earth formed from the same cloud of material and coalesced as two separate objects.

Accepted Answer

The answer of The ____________________ hypothesis for the formation of...

Question 9

Lobate scarps are believed to have formed on the moon when its interior cooled and shrank.

Accepted Answer

A) True 
 B)False

Question 10

____ are believed to have formed on Mercury when the planet's interior cooled and shrank.

Accepted Answer

A)  Jumbled terrain 
B)  The highlands 
C)  Maria 
D)  Lobate scarps 
E)  Sinuous rilles 
A)  Jumbled terrain 
B)  The highlands 
C)  Maria 
D)  Lobate scarps 
E)  Sinuous rilles

Question 11

Which of the terrestrial planets has the most difficult time retaining an atmosphere?

Accepted Answer

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

Question 12

The dividing line between daylight and darkness on the Moon is called the ____________________.

Accepted Answer

The answer of The dividing line between daylight and darkness...

Question 13

____________________ formed as Mercury cooled and shrank.

Accepted Answer

The answer of ____________________ formed as Mercury cooled and shrank....

Question 14

Why is it surprising that Mercury's magnetic field is strong enough to be measured (> >Earth's moon's),yet significantly weaker than Earth's magnetic field?

Accepted Answer

A)  Mercury's density suggests its core is like Earth's,so its magnetic field should be of nearly equal strength. 
B)  Mercury is hot enough that its core should be very molten and produce a magnetic field larger than Earth's. 
C)  Mercury's small size suggests that it should no longer have a molten core,so no magnetic field is expected. 
D)  Mercury rotates so slowly that it should not be able to produce a magnetic field. 
E)  Mercury is so close to the sun that its magnetic field should be destroyed by the solar wind. 
A)  Mercury's density suggests its core is like Earth's,so its magnetic field should be of nearly equal strength. 
B)  Mercury is hot enough that its core should be very molten and produce a magnetic field larger than Earth's. 
C)  Mercury's small size suggests that it should no longer have a molten core,so no magnetic field is expected. 
D)  Mercury rotates so slowly that it should not be able to produce a magnetic field. 
E)  Mercury is so close to the sun that its magnetic field should be destroyed by the solar wind.

Question 15

The presence of breccias among the lunar rock samples shows that

Accepted Answer

A)  volcanism did not occur on the moon. 
B)  molten lava once flowed over the lunar surface. 
C)  the crust must have been made of anorthosite. 
D)  water once existed on the moon in the form of small lakes and streams. 
E)  the lunar surface was fragmented by meteorite impacts. 
A)  volcanism did not occur on the moon. 
B)  molten lava once flowed over the lunar surface. 
C)  the crust must have been made of anorthosite. 
D)  water once existed on the moon in the form of small lakes and streams. 
E)  the lunar surface was fragmented by meteorite impacts.

Question 16

The Earth's moon has a high escape velocity compared to Earth.

Accepted Answer

A) True 
 B)False

Question 17

How were the smooth,dark plains called maria formed on the Moon's surface?

Accepted Answer

A)  They were formed by tidal interactions with the Earth very early on in its history. 
B)  The maria are ancient sites of gigantic impact craters and have smoothed over time. 
C)  They were formed from lava flows that covered old,cratered lowlands. 
D)  The maria formed where solar flares touched the surface of the Moon and scarred it. 
A)  They were formed by tidal interactions with the Earth very early on in its history. 
B)  The maria are ancient sites of gigantic impact craters and have smoothed over time. 
C)  They were formed from lava flows that covered old,cratered lowlands. 
D)  The maria formed where solar flares touched the surface of the Moon and scarred it.

Question 18

The first Apollo missions to the Earth's moon found the maria to be hard plains of solid lava.

Accepted Answer

A) True 
 B)False

Question 19

The presence of vesicular basalts among the lunar rock samples shows that

Accepted Answer

A)  the lunar surface was fragmented by meteorite impacts. 
B)  volcanism did not occur on the moon. 
C)  the crust must have been made of anorthosite. 
D)  molten lava once flowed over the lunar surface. 
E)  the moon was once hit by a very large meteorite. 
A)  the lunar surface was fragmented by meteorite impacts. 
B)  volcanism did not occur on the moon. 
C)  the crust must have been made of anorthosite. 
D)  molten lava once flowed over the lunar surface. 
E)  the moon was once hit by a very large meteorite.

Question 20

The temperature on the daylight side of Mercury

Accepted Answer

A)  is about the same as the night side because Mercury rotates so quickly. 
B)  is about the same as the night side because of the thick clouds on Mercury. 
C)  is about 400$\degree$hotter than the night side because Mercury rotates very slowly. 
D)  is about 400$\degree$ hotter than the night side because one side of Mercury never faces the sun. 
E)  is hot enough that the surface rocks periodically melt and form lava flows. 
A)  is about the same as the night side because Mercury rotates so quickly. 
B)  is about the same as the night side because of the thick clouds on Mercury. 
C)  is about 400$\degree$hotter than the night side because Mercury rotates very slowly. 
D)  is about 400$\degree$ hotter than the night side because one side of Mercury never faces the sun. 
E)  is hot enough that the surface rocks periodically melt and form lava flows.

Exam 21: The Moon and Mercury: Comparing Airless Worlds

____________________ basin is the largest known impact crater on Mercury.

Slow surface evolution on the moon is limited to

Slow surface evolution on Mercury is due to

The airless and inert nature of the Earth's moon results in ____ craters per unit area as on Earth.

The time it takes Mercury to complete a solar day (the time from sunrise to sunrise)

The surface temperature of Mercury is

The oldest parts of the surface of Mercury are believed to be

The ____________________ hypothesis for the formation of the moon suggests that the moon and earth formed from the same cloud of material and coalesced as two separate objects.

Lobate scarps are believed to have formed on the moon when its interior cooled and shrank.

____ are believed to have formed on Mercury when the planet's interior cooled and shrank.

Which of the terrestrial planets has the most difficult time retaining an atmosphere?

The dividing line between daylight and darkness on the Moon is called the ____________________.

____________________ formed as Mercury cooled and shrank.

Why is it surprising that Mercury's magnetic field is strong enough to be measured (> >Earth's moon's),yet significantly weaker than Earth's magnetic field?

The presence of breccias among the lunar rock samples shows that

The Earth's moon has a high escape velocity compared to Earth.

How were the smooth,dark plains called maria formed on the Moon's surface?

The first Apollo missions to the Earth's moon found the maria to be hard plains of solid lava.

The presence of vesicular basalts among the lunar rock samples shows that

The temperature on the daylight side of Mercury

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

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