There is no evidence of geologic activity from the information obtained in Activity 5. However after
viewing information in Activity 5, there seems to be geologic activity on all of Jupiter’s Galilean moons.
Lo, Europa, Ganymede and Callisto all have evidence of geologic activity. Io has impact cratering evident
on its surface. Although it doesn’t have a high density of this. There is definitely evidence of volcanoes
on its surface. Also different surface are evident portraying graben and horst. Europa has an ice surface.
It has major evidence of cross cutting. There are also gaben and horst evidence in the pictures shown.
There were some impact craters shown with cross cutting as well as evidence of the Law of Horizontally.
The third planet observed was Ganymede which had a high evidence of impact cratering with a high
desnity of craters. It also had many cross cutting on its planet. It has evidence of the law of horizontally
within the picture. The moon of Callisto had evidence of very high impact cratering. It was by far the
most observed geologic activity on the moon. It also has evidence of Valhalla which is cratering inside of
cratering. In order of geologic activity is Lo is 1. Judging by the impact crater with so few they must have
been taken away by other geological processes. Europa is rated a 2 for its relatively low impact
cratering. Ganymede gets a rating of a 3. With impact cratering evident throughout its surface. Callisto
is given a rating of a 4. It has significantly high impact cratering showing there are little to no geologica
processes.
Density (gm/cm3)
4
3.5
3
2.5
2
Density (gm/cm3)
1.5
1
0.5
0
0
1
2
3
4
5
Based on the plot above and the observations given, one can infer that moon density is directly related
to geologic activity. The lower the density; the lower the geologic activity. This is because the core of
the smaller density moons is smaller. The parameters that control geologic activity is density.