Edexcel International GCSE Physics

Edexcel International GCSE Physics Fission and Fusion Exam Questions

Free Edexcel International GCSE Physics exam questions on Fission and Fusion, with mark schemes. Covers nuclear fission, chain reactions, reactors and nuclear fusion.

Fission and Fusion exam questions

These packs of real past exam questions cover the whole of Section 7: Radioactivity and Particles, including Fission and Fusion. Work through every question on this sub-topic, then mark your answers against the mark scheme.

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About Edexcel International GCSE Physics Fission and Fusion

This sub-topic covers nuclear energy.

What you need to know

  • Fission Neutrons split uranium-235.
  • Reactors Control rods and moderators.
  • Fusion Joining nuclei in stars.

Common mistakes in Fission and Fusion

  • Mixing control rods and moderator roles.
  • Saying fusion happens in reactors today.

Try two Fission and Fusion exam-style questions

1. State the role of control rods. (1 mark)

Show the mark scheme answer

Absorb neutrons to control the rate.

2. Explain why fusion needs high temperatures. (1 mark)

Show the mark scheme answer

Nuclei must overcome electrostatic repulsion.

Fission and Fusion FAQs

What does this cover?

Fission, reactors and fusion.

What is a chain reaction?

Neutrons from one fission cause further fissions.