Gigante roja

The video explains the lifecycle of a star as it consumes hydrogen through nuclear fusion and transitions to burning heavier elements. This process leads to the core collapsing and heating up, causing the outer layers to expand and cool, giving the star a reddish-orange color. Eventually, the sun will also become a red giant, potentially expanding enough to engulf the Earth.

What happens to a star when it has used up its hydrogen fuel?

• It becomes a black hole.

• It explodes immediately.

• It starts burning heavier elements.

• It stops shining.

What is the result of the core collapsing and heating up in a star?

• The star turns blue.

• The star becomes a supernova.

• The star's outer layers expand and cool.

• The star's outer layers contract.

What color does a star typically become when its outer layers expand and cool?

• Reddish-orange

• Yellow

• White

• Blue

What is the future of the sun as it becomes a red giant?

• It will shrink and become a white dwarf.

• It will expand and possibly engulf the Earth.

• It will remain the same size.

• It will explode as a supernova.

Which of the following is a characteristic of a red giant star?

• It is cooler than a white dwarf.

• It has a reddish-orange color.

• It has a bluish color.

• It is very small and dense.