Multiple Choice
Why is the moon Io volcanically active with a hot interior?
A) Radioactive decay of elements in Io's core heat up the rock to molten temperatures.
B) Io is very close to the Sun.
C) Io was formed later than the other Galilean satellites, so it hasn't finished cooling yet.
D) Io gets flexed between the changing gravitational pulls of Jupiter and Europa, heating it by friction.
Correct Answer:
Verified
Correct Answer:
Verified
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