Drag the tiles to the boxes to form correct pairs. Use the Hertzsprung-Russell diagram to determine which condition describes each star. Use the arrows to help locate the stars.

A) Betelgeuse
B) the Sun
C) Sirius B

The star can no longer support nuclear fusion because it has exhausted its supply of hydrogen:

The star’s hydrogen supply is running low, so it is fusing hydrogen from outside the core:

The star is experiencing nuclear fusion at its core: