CAIE IGCSE Physics 6.2.1.2 Stars Are Powered By Nuclear Reactions Questions

Learn how hydrogen fusion forms helium and transfers energy as electromagnetic radiation.

Exam points

identify nuclear fusion, not fission or chemical burning, as the power source of stable stars
state that hydrogen nuclei join to form helium nuclei while releasing energy
link released energy to electromagnetic radiation transferred from a star’s surface

[Maximum number: 3]

The Milky Way is one of many billions of galaxies. Each galaxy contains many billions of stable stars.

Stable stars transfer energy into space by emitting electromagnetic radiation from their surfaces.

Describe what happens in the core of a stable star to release energy that is eventually transferred into space.

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CAIE IGCSE Physics 6.2.1.2 Stars Are Powered By Nuclear Reactions Questions question 1