What appears to be the origin of the light, grooved terrain on the surface of Ganymede?
A) impacts by cometary debris
B) cracking of the surface caused by shrinkage of the moon as it cooled
C) cracking of the icy surface, releasing water that expanded as it froze into ice
D) flow of water on the solid surface of the moon at some time in the past, which subsequently shrank as it froze into this distinctive terrain

Question

Quizplus · Accepted Answer

The light, grooved terrain on Ganymede is believed to have originated from the cracking of its icy surface. This cracking allowed water to be released, which then expanded as it froze into ice, creating the distinctive grooved appearance.

What Appears to Be the Origin of the Light, Grooved