OCR GCSE Combined Science A · J250
Specification WS1.4c · Biology Paper 1, Biology Paper 2, Chemistry Paper 1, Chemistry Paper 2, Physics Paper 1, Physics Paper 2
Revise: SI Units and IUPAC NomenclatureThe International System of Units, abbreviated to SI, gives scientists a shared system for recording measurements and communicating results. Using consistent units also allows values to be used together correctly in equations.