heavily cratered, water ice surface

The surface of Callisto is heavily cratered and extremely old. It does not show any sign of volcanic activity.

The percentage of ice on Callisto is 40%.

source:

wikipedia

Same as Jupiter, since Callisto is a moon of Jupiter.

yes.actually Jupiter has many moons. of these,io,europa,ganymede and callisto are the largest and the main ones....

They are also called the Gallilean satellites, after their discoverer.

no

you would wrigh 3 times as muchType your answer here...

Callisto rotation is synchronously locked with Jupiter, so it's rotation is the same as its revolution of 16.689 days.

I doubt it, Callisto is very cold and probably has more ice than volcanic activity. Based on its surface though, it once may have been hot enough for some volcanoes, but more likely pummeled by meteoric debris.

Callisto is a moon, and moons do not have moons of their own. The gravitational influence of the planet would overwhelm any tendency of a moon to acquire its own moons.

There is probably nothing on Callisto that we humans would recognize as food. However, all of the required building blocks of food are there; carbon, hydrogen, oxygen and nitrogen, the CHON elements of life. Eventually, we will be able to synthesize food from those elements.

20 years

Callisto's surface age is 4 billion years old.

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