The structure of Callisto, the outer Galilean satellite of Jupiter, is thought to be:

Question

Quizplus · Accepted Answer

This is the most widely accepted model of Callisto's structure, based on observations and theoretical modeling. It is believed to have a thick ice crust and a slushy mantle of ice and water over a core of rock. There is no evidence of recent geological activity, such as volcanoes, indicating that the interior of the moon is not actively convecting. Option B is incorrect as there is no known evidence of any active volcanoes on Callisto. Option C is incorrect as a thin layer of 100 km would not adequately explain the observed geology of the moon. Option D is also incorrect as there is no support for a jumbled mixture of rock and ice in Callisto's interior.

The Structure of Callisto, the Outer Galilean Satellite of Jupiter