NASA | Afterschool Universe: Stellar Fusion Demonstration

The video explains how stars fuse elements in their cores, starting with hydrogen fusion into helium. As stars evolve, they fuse helium into carbon, then carbon and helium into oxygen, and finally oxygen and helium into neon. This process continues until iron is formed, at which point fusion requires energy input, marking the end of the star's lifecycle.

What is the process called when hydrogen atoms stick together inside a star?

Describe the sequence of elements formed as a star fuses hydrogen and helium.

What happens to a star's core when hydrogen fusion stops?

Explain what occurs when a star fuses carbon and helium.

What is the significance of iron formation in the life cycle of a star?