What is the main control on whether a planet or moon has active tectonics and volcanism?
A) whether it is composed of rocks or ice
B) whether it contains water on its surface
C) the size of an object
D) the distance that the object is from the Sun

Question

Quizplus · Accepted Answer

The main control on whether a planet or moon has active tectonics and volcanism is its size. Larger objects retain heat better, which can drive geological activity, while smaller objects cool faster and are more likely to be geologically inactive.

What Is the Main Control on Whether a Planet or Moon