OCR GCSE Biology B · J257
Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
Revise: Percentage Mass CalculationsAlways check that the whole mass describes the same sample as the part.
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GCSE Biology · key term
The total mass against which the mass of a substance or part is compared.
Used by OCR
Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
Revise: Percentage Mass CalculationsAlways check that the whole mass describes the same sample as the part.
Identify the whole mass before calculating: it belongs in the denominator.
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