The surface of Callisto, the outer Galilean moon of Jupiter, can BEST be described as
A) relatively smooth, with many large impact craters and one large basin created by an asteroid impact.
B) relatively smooth, with many small craters but no evidence of large impacts.
C) rough and mountainous, with evidence of either volcanoes or geyserlike activity.
D) very smooth, with a network of streaks and cracks and very few craters.

Question

Quizplus · Accepted Answer

Callisto's surface is known for being heavily cratered, making it one of the most heavily cratered objects in the Solar System. It has a very old, heavily cratered landscape with a large impact basin, Valhalla, being one of its most notable features. This indicates a surface that has remained geologically inactive for much of its history, preserving the record of impacts for billions of years.

The Surface of Callisto, the Outer Galilean Moon of Jupiter