Which Description Is TRUE of the Surface of Callisto,the Outer

question 115

Multiple Choice

Which description is TRUE of the surface of Callisto,the outer Galilean moon of Jupiter?

• A) very dark, rocky surface with a thin ice frost that occasionally disappears by evaporation when illuminated by the sun
• B) ammonia and methane ice surface with methane clouds above it, making the moon appear very bright
• C) ice-covered and heavily cratered surface with a dark coating, maybe of meteoritic dust or hydrocarbon material, making the moon appear dark
• D) sulfur-coated surface with molten sulfur lakes and active volcanoes

---

Definitions:

Molecular Weight

A measure of the mass of a molecule, calculated as the sum of the atomic masses of all atoms constituting the molecule.

Grams

A metric unit of mass equal to one thousandth of a kilogram.

Mass

A measure of the amount of matter in an object, often quantified in units like kilograms or grams.

Material

Substance or substances out of which a thing is or can be made.