Which list only includes man-made sources of background radiation?
cosmic rays, medical X-rays, radioactive fallout
radioactive waste, radon gas, medical X-rays
medical X-rays, radioactive fallout, nuclear power emissions
cosmic rays, food and drink, nuclear power emissions
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.