What happens to a star's core as the hydrogen there is used up?
A) Nothing. It just turns to helium.
B) It expands and cools.
C) It contracts and cools.
D) It contracts and heats.
E) As the helium accumulates, the core rises to the surface of the star and escapes into space.

Question

Quizplus · Accepted Answer

As the hydrogen in a star's core is used up, the core contracts under gravity and heats up, eventually leading to the fusion of helium and other heavier elements.

What Happens to a Star's Core as the Hydrogen There