Why is exposure to ionising radiation a hazard to human health?
It makes the cells themselves strongly radioactive.
It causes immediate chemical combustion of body tissues.
It can damage DNA inside cells, potentially leading to cell mutation and cancer.
It only causes harm if the source of radiation is physically swallowed.
42 exam-style questions on CIE IGCSE Physics 5.2.5 Effects of ionising radiation and safety precautions. Each one has a worked solution and a mark scheme showing where the marks go.