Star Review

What do stars like our sun do at their core?

• They turn helium into hydrogen.

• They fuse hydrogen into helium.

• They create light directly.

• They stop producing energy.

What happens when a star becomes a red giant?

• It shrinks and cools down.

• It stops producing energy.

• It turns into a black hole.

• Its outer layers expand.

Why can't stars fuse elements beyond iron?

• Stars run out of fuel before reaching iron.

• Iron fusion releases too much energy.

• Iron fusion consumes energy.

• Iron is too heavy to fuse.

What is formed when a massive star goes supernova?

• Only lighter elements like helium.

• Elements heavier than iron.

• Only hydrogen and helium.

• No new elements are formed.

What can the core of a massive star become after a supernova?

• A new sun.

• A neutron star or a black hole.

• A comet.

• A planet.

Explain what gives stars their light

What causes stars to collapse?

How is a red giant formed?

Why is Iron fusion different from smaller elements?

Compare supernovas, neutron stars, and black holes