Red giant

The video explains the lifecycle of a star as it exhausts its hydrogen fuel, leading to core collapse and heating. This process causes the outer layers to expand and cool, giving the star an orange to red color. Eventually, the sun will become a red giant, expanding to potentially engulf the Earth.

What happens to a star when it exhausts its hydrogen supply?

• It becomes a black hole.

• It stops shining completely.

• It starts burning heavier elements.

• It explodes into a supernova.

What is the result of the core collapsing in a star?

• The star becomes a neutron star.

• The star's outer layers contract.

• The core heats up and the outer layers expand.

• The star's temperature decreases.

What color does a star typically exhibit when its outer shell cools down?

• Purple to pink

• Orange to red

• Green to yellow

• Blue to white

What is the eventual fate of the sun as it expands?

• It will explode as a supernova.

• It will become a black hole.

• It will turn into a white dwarf.

• It will likely engulf the Earth.

Which phase will the sun enter as it expands and cools?

• Neutron star phase

• Red giant phase

• Supernova phase

• White dwarf phase