AY 101-002                                                        Spring 2008
                                   QUIZ #6

Answer each of the following on a computer-gradeable answer sheet. Be
sure to fill in your name and student number (and blacken their circles as 
well). Write your seat number on a corner of the answer sheet.

1. Jupiter's moon Io shows a complete lack of craters, because it has
   a) a liquid surface.               c) a cycle of plate tectonics.
   B) FREQUENTLY ERUPTING VOLCANOS.   d) a thick protective atmosphere.

2. Jupiter's moon Europa interests those seeking extraterrestrial life because
   A) IT APPEARS TO HAVE AN EXTENSIVE OCEAN BELOW THE SURFACE.
   b) it shows spectroscopic features of chlorophyll.
   c) its atmosphere is rich in oxygen.
   d) it lies far from Jupiter's damaging radiation belts.

3. Some moons remain geologically active much longer than their size alone
    would suggest,
   a) indicating unusual amounts of radioactive elements.
   B) WHEN TIDAL FORCES FROM SURROUNDING OBJECTS STRETCH AND HEAT THEIR CORES.
   c) indicating that they have formed quite recently.
   d) indicating their recent arrival from elsewhere in the solar system.

4. Most minor planets (or asteroids) are located
   a) beyond the orbit of Neptune.
   B) BETWEEN THE ORBITS OF MARS AND JUPITER.
   c) between the orbits of Earth and Mars.
   d) in orbits with simple ratios to Jupiter's (such as 1/2, 2/3 its period).

5. Giant planets show rings, rather than close large moons, because
   a) the planets' heat would evaporate the moons.
   B) THE PLANETS' TIDAL FORCES WOULD DESTROY LARGE MOONS.
   c) no suitable material is solid in that part of the solar system.
   d) they rotate so rapidly.

6. Some planetary rings are known to be made of material
   a) originating in the planets' atmospheres.
   b) thrown upward by volcanic eruptions on the giant planets.
   C) BLASTED OFF OF SMALL MOONS BY METEORITE IMPACTS.
   d) from gravitationally disrupted comets.

7. In the broad classification of the geological history of moons, our
    own Moon falls in the class of
   a) active.                          c) possibly active.
   B) FORMERLY ACTIVE.                 d) inactive and always been so.

8. Most of the interior of Jupiter and Saturn is probably composed of
   a) ice.
   b) dense, rocky cores.
   c) gaseous atmospheric layers of hydrogen and helium.
   D) METALLIC HYDROGEN.

9. The huge difference in mass between the giant planets and the Earthlike ones
   a) means that there was once more rocky material in the outer solar system.
   b) probably means that many massive moons crashed into the giants.
   c) is caused by the giants' rapid rotation.
   D) IS DUE TO THE GIANTS' BEING ABLE TO RETAIN HYDROGEN AND HELIUM.

10. The odd rotation and magnetic field of Uranus are thought to result from
   a) gravitational interaction with Jupiter.
   B) A MASSIVE IMPACT IN ITS EARLY HISTORY.
   c) its peculiar chemical makeup.
   d) a different origin than the other planets.