The "snow" that falls continuously on the surface of Io, the innermost Galilean moon of Jupiter, is composed of
A) ammonia crystals.
B) water crystals.
C) sulfur and sulfur dioxide.
D) methane crystals.

Question

Quizplus · Accepted Answer

The "snow" on Io is primarily composed of sulfur and sulfur dioxide, which are ejected from the moon's numerous volcanoes and then fall back to its surface.

The "Snow" That Falls Continuously on the Surface of Io