OCR GCSE Biology B · J257
Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
Revise: Planning ExperimentsA good procedure is sufficiently clear and logically sequenced for another scientist to carry it out. Put instructions in the order in which they must happen. Each step should say what is done and, where relevant, the quantity, measuring instrument, unit, duration or criterion used.