As a protostar is evolving, its temperature
A) decreases because it is radiating.
B) decreases because of gravitational contraction.
C) decreases because of angular momentum.
D) increases because of nuclear fusion.
E) increases due to the kinetic energy of infalling material.

Question

Quizplus · Accepted Answer

As a protostar evolves, its temperature increases due to the kinetic energy of infalling material, which is converted into heat as the material compresses and contracts under gravity.

As a Protostar Is Evolving, Its Temperature