GLG130F

Second Term Test

Nov. 18 1996

Read all questions carefully. Each multiple choice question is worth one point: choose the best answer. If you have not already done so, write your name and student number onto the exam now.

  1. Sinuous rilles on the moon are formed by
    1. water flows
    2. faulting as a result of rifting
    3. the collapse of lava tubes
    4. none of the above
  2. Maria are
    1. Lunar highlands
    2. Lunar peaks
    3. Lunar basaltic flows
    4. made of anorthositic rocks
  3. Mercury is
    1. in a 1:1 spin-orbit resonance
    2. in a 3:2 spin-orbit resonance
    3. in a 3:2 orbit-orbit resonance
    4. not in a resonance
  4. The surface of Venus is dominated by
    1. Impact features
    2. Volcanic features
    3. Continents
    4. None of the above
  5. The atmosphere of Venus is
    1. primarily molecular nitrogen ($N_2$)
    2. primarily sulfuric acid
    3. primarily carbon dioxide ($CO_2$)
    4. similar to that of the giant planets
  6. Shield volcanoes on Venus are
    1. most common in the lowlands
    2. most common in the highlands
    3. roughly equally common in both highlands and lowlands
    4. very rare
  7. The atmosphere of Mars is:
    1. similar in composition but less dense than that of Earth
    2. similar in composition but less dense than that of Venus
    3. similar to that of the giant planets
    4. none of the above
  8. Mars is about the same size as Mercury, but has been much more active geologically. This is probably because
    1. Mars has an atmosphere, whereas Mercury does not
    2. Mars has a smaller area/mass ratio than Mercury, so it cooled more slowly
    3. Mars formed further from the sun, so it incorporates more volatile (lower melting point) material than Mercury
    4. Mars is more dense than Mercury
Part 2

[2] 1. Briefly describe two ways in which craters on Mercury differ from those on the moon.

[2] 2. What are lobate scarps, and how are they believed to have formed on Mercury?

[2] 3. How does the core of Mercury differ from those of the moon or Mars? What evidence suggests that there is a difference?

[3] 4. Venus has only a very weak magnetic field. From this observation one might conclude that the core of Venus is solid. Summarize the evidence both for and against this conclusion.

[2] 5. What is the evidence that water erosion has occurred on Mars?

[2] 6. Is there other evidence for the presence of water on Mars?

Part 3

Mark the location of the following features on the picture below:

  1. Younger terrain.
  2. Older terrain.
  3. An example of a young crater.
  4. An example of an old crater

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