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GCSE Combined Science · key term
Obtaining a numerical value for a quantity by comparing it with a standard unit, usually using an instrument.
Used by OCR
Specification WS1.4b · Biology Paper 1, Biology Paper 2, Chemistry Paper 1, Chemistry Paper 2, Physics Paper 1, Physics Paper 2
Revise: Scientific QuantitiesMeasurements allow scientists to compare results, identify patterns and check whether observations support a hypothesis. Accurate measurements matter because a misleading reading can lead to a misleading conclusion.
When explaining how a quantity is determined, name the apparatus and the measurements needed, rather than just saying ‘measure it’.
Repeat measurements can reduce the effect of random variation, but they do not correct a balance that has not been zeroed.
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