1. What drives the geologic activity of the Galilean Satellites?

a. Orbital resonances and tidal interactions.
b. Radioactive heating.
c. The absorption of solar radiation.
d. Magnetic interactions with Jupiter.
e. Heating from meteorite impacts.

2. Which of the following moons has the thickest atmosphere?

a. Io.
b. Europa.
c. Ganymede.
d. Callisto.
e. Titan.

3. Which moon is pictured here?

a. Io.
b. Europa.
c. Ganymede.
d. Callisto.
e. Titan.

(color is enhanced)

4. Which moon is pictured here?

a. Io.
b. Europa.
c. Ganymede.
d. Callisto.
e. Titan.

(B/W image)

5. Which moon is pictured here?

a. Io.
b. Europa.
c. Ganymede.
d. Callisto.
e. Titan.

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Last modified 3 December, 2006. © Gregory C. Sloan.