GEOL 109 Exam 2
Study online at https://quizlet.com/_88c39t
1. Lesson 16 - Mer- ...
cury: The Iron
Planet
2. Would you be Yes, that is not expected to happen on Mercury today.
surprised if to-
morrow's news- Mercury no longer has volcanic activity because its lithosphere is too thick for
paper reported magmas to penetrate.
that a volcano
was discovered
erupting on Mer-
cury?
3. What causes the different gravitational attractions on each planet
differences be-
tween impact Gravitational pull can affect the extent of crater ejecta and secondary craters. Both
craters on the of these craters will extend for greater distances on planetary bodies that have
Moon and those less gravity.
on Mercury (the
extent of the
ejecta blanket
and secondary
cratering)?
4. What do thermal That it developed a metallic core early in its history.
models of Mer-
cury's evolution The iron within Mercury separated out into a core early in the planet's history.
suggest about its
history?
5. The oldest types heavily cratered terrain
of terrains on
, GEOL 109 Exam 2
Study online at https://quizlet.com/_88c39t
both the Moon Heavily cratered terrain is older than terrain with less craters, since cratering rate
and Mercury are has decreased with time.
________________________.
6. Which of the fol- -flood lavas
lowing features -multi-ring basins
are found on the -impact craters
Moon and Mer- -faults related to contraction
cury? (Check all
that apply) NOT: dunes
All but dunes are found on both the Moon and Mercury. Dunes do not exist
because there is not atmosphere to move particles to form them.
7. Which image B
shows a fea-
ture that formed Contraction produces lobate features, while extension produces linear valleys.
by contraction
of Mercury's sur-
face?
8. Which of the -thrust faulting due to contraction of the planet
following tecton- -graben formation due to extension
ic processes are
thought to have Both extensional and contractional tectonics have occurred on Mercury. Exten-
occurred on Mer- sion produces graben while contraction produces thrust faults. It is important
cury? (Check all to remember extension cannot produce thrust faults nor contractions produce
that apply) grabens.
9. Mercury's may be similar in origin to the lunar maria
smooth plains
The smooth plains have few craters compared to the heavily cratered terrain and
____________________.
resemble the lunar maria.
, GEOL 109 Exam 2
Study online at https://quizlet.com/_88c39t
10. One of these im- A
pact craters is on
the Moon and Crater A has secondary impacts close to the rim, while B has secondary craters
the other is on farther from the crater.
Mercury. Click on
the one on Mer-
cury.
11. What explains -Mercury formed near the Sun in a zone that was oxygen-poor and rich in metallic
for Mercury's iron.
iron large core? -A large impact stripped away the silicate shell from an already differentiated
Choose the two Mercury.
most likely.
There are two main theories as to why Mercury has such a large iron core. The
first is, Mercury accreted in an oxygen-poor area that allowed iron to remain in its
metallic state allowing close to all of the iron to segregate in the core.
The second hypothesis is a giant impact knocked off much of Mercury's mantle
without affecting the core, so now the core is large compared to Mercury's
diameter.
12. Lesson 17 - Mars: ...
The Red Planet
13. Although both Mars is more volatile rich.
Mercury and
Mars have sim- Because Mars accreted further from the Sun than Mercury, Mars has a greater
ilar gravity amount of volatiles. These volatiles were outgassed and released past the surface
fields, Mars has of Mars where they were trapped by the gravity field of Mars.
an atmosphere
whereas Mercury
does not. What is
Study online at https://quizlet.com/_88c39t
1. Lesson 16 - Mer- ...
cury: The Iron
Planet
2. Would you be Yes, that is not expected to happen on Mercury today.
surprised if to-
morrow's news- Mercury no longer has volcanic activity because its lithosphere is too thick for
paper reported magmas to penetrate.
that a volcano
was discovered
erupting on Mer-
cury?
3. What causes the different gravitational attractions on each planet
differences be-
tween impact Gravitational pull can affect the extent of crater ejecta and secondary craters. Both
craters on the of these craters will extend for greater distances on planetary bodies that have
Moon and those less gravity.
on Mercury (the
extent of the
ejecta blanket
and secondary
cratering)?
4. What do thermal That it developed a metallic core early in its history.
models of Mer-
cury's evolution The iron within Mercury separated out into a core early in the planet's history.
suggest about its
history?
5. The oldest types heavily cratered terrain
of terrains on
, GEOL 109 Exam 2
Study online at https://quizlet.com/_88c39t
both the Moon Heavily cratered terrain is older than terrain with less craters, since cratering rate
and Mercury are has decreased with time.
________________________.
6. Which of the fol- -flood lavas
lowing features -multi-ring basins
are found on the -impact craters
Moon and Mer- -faults related to contraction
cury? (Check all
that apply) NOT: dunes
All but dunes are found on both the Moon and Mercury. Dunes do not exist
because there is not atmosphere to move particles to form them.
7. Which image B
shows a fea-
ture that formed Contraction produces lobate features, while extension produces linear valleys.
by contraction
of Mercury's sur-
face?
8. Which of the -thrust faulting due to contraction of the planet
following tecton- -graben formation due to extension
ic processes are
thought to have Both extensional and contractional tectonics have occurred on Mercury. Exten-
occurred on Mer- sion produces graben while contraction produces thrust faults. It is important
cury? (Check all to remember extension cannot produce thrust faults nor contractions produce
that apply) grabens.
9. Mercury's may be similar in origin to the lunar maria
smooth plains
The smooth plains have few craters compared to the heavily cratered terrain and
____________________.
resemble the lunar maria.
, GEOL 109 Exam 2
Study online at https://quizlet.com/_88c39t
10. One of these im- A
pact craters is on
the Moon and Crater A has secondary impacts close to the rim, while B has secondary craters
the other is on farther from the crater.
Mercury. Click on
the one on Mer-
cury.
11. What explains -Mercury formed near the Sun in a zone that was oxygen-poor and rich in metallic
for Mercury's iron.
iron large core? -A large impact stripped away the silicate shell from an already differentiated
Choose the two Mercury.
most likely.
There are two main theories as to why Mercury has such a large iron core. The
first is, Mercury accreted in an oxygen-poor area that allowed iron to remain in its
metallic state allowing close to all of the iron to segregate in the core.
The second hypothesis is a giant impact knocked off much of Mercury's mantle
without affecting the core, so now the core is large compared to Mercury's
diameter.
12. Lesson 17 - Mars: ...
The Red Planet
13. Although both Mars is more volatile rich.
Mercury and
Mars have sim- Because Mars accreted further from the Sun than Mercury, Mars has a greater
ilar gravity amount of volatiles. These volatiles were outgassed and released past the surface
fields, Mars has of Mars where they were trapped by the gravity field of Mars.
an atmosphere
whereas Mercury
does not. What is
