Which list only includes man-made (artificial) sources of background radiation?
cosmic rays, medical X-rays, nuclear power station emissions
radon gas, radiation from food and drink, cosmic rays
medical X-rays, radioactive fallout from nuclear weapons testing, nuclear power station emissions
rocks and soil, medical X-rays, radioactive fallout from nuclear weapons testing
44 exam-style questions on CIE IGCSE Physics 5.2.1 Background radiation and measuring count rate. Each one has a worked solution and a mark scheme showing where the marks go.