Answers are in blue.

1. Volcanoes are larger on Mars than on the Earth because ...

a. Mars is larger.
b. Lava on Mars was thicker and denser.
c. Mars is more geologically active.
d. Mars does not have plate tectonics like the Earth.
e. None of the above.

2. Mars has regions with differing crater densities (or counts) because ...

a. some areas have been resurfaced.
b. more impacting meteorites come from some directions than others.
c. the atmosphere is thicker and more protective in some areas.
d. All of the above.
e. None of the above.

3. The surface of Venus has been imaged using ...

a. probes which penetrated the atmosphere and landed on the surface.
b. radar from orbiters.
c. radar from Earth.
d. All of the above.
e. None of the above.

4. The key piece of evidence that led to the acceptance that plate tectonics occurred on the Earth was ...

a. the existence of earthquakes.
b. how the continents fit together like a jigsaw puzzle.
c. the existence of mid-oceanic ridges.
d. documented changes in global sea level.
e. changes in the type of lava produced by erupting volcanoes.

5. Which of the following correlates best with the level of geologic activity on the terrestrial worlds?

a. Diameter.
b. Surface temperature.
c. Inclination of rotation axis.
d. Atmospheric pressure.
e. Distance from the Sun.

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Last modified 10 November, 2006. © Gregory C. Sloan.