Which of these is a natural source of background radiation?
Fallout from the testing of nuclear weapons in the atmosphere
Waste stored on the site of an old nuclear power station
Cosmic rays that arrive at the Earth from outer space
Material released into the air by a nuclear reactor accident
40 exam-style questions on AQA GCSE Physics 4.3 Hazards and uses of radioactive emissions and of background radiation, covering 4.3.1 Background radiation, 4.3.2 Different half-lives of radioactive isotopes, and 4.3.3 Uses of nuclear radiation. Each one has a worked solution and a mark scheme showing where the marks go.