What causes the explosion produced by a nuclear weapon?
A controlled chain reaction inside a sealed reactor
An uncontrolled chain reaction inside the material
A single fission of one large and unstable nucleus
A fusion reaction between two very light nuclei
40 exam-style questions on AQA GCSE Physics 4.4 Nuclear fission and fusion, covering 4.4.1 Nuclear fission and 4.4.2 Nuclear fusion. Each one has a worked solution and a mark scheme showing where the marks go.