1. the largest moon in the solar system is
2. the jovian moon with the most geologically active surface is
3. strong evidence both from surface features and magnetic field data support the existence of a subsurface ocean on
4. is responsible for the tremendous volcanic activity on io.
5. is the most distant of jupiter's four galilean moons.
6. the fact that europa orbits jupiter twice for every one orbit of ganymede is an example of a(n)