What happens to the star's outer layers as the fuel in its core is used up?
A) They shrink and cool.
B) They shrink and heat up.
C) They expand and cool.
D) They expand and heat up.
E) Nothing. Only the interior changes.

Question

Quizplus · Accepted Answer

As a star exhausts the fuel in its core, the core contracts and heats up, causing the outer layers to expand and cool, often forming a red giant.

What Happens to the Star's Outer Layers as the Fuel