Unit

An agreed measurement standard used to express a quantity, such as the metre for length.

An agreed standard used to express a measurement, such as the metre for length.

A measurement needs both a number and a unit. The unit tells you what the number means: a distance of 5 metres is very different from a distance of 5 kilometres.

A standard used to express the size of a quantity, such as the metre for length.

Convert both parts of a compound unit: changing km/h to m/s requires converting kilometres and hours.

Include the correct unit with your answer and keep unrounded values until the final step.

Give the unit with a numerical answer unless it is already printed beside the answer space. Match the unit to the quantity being calculated.

A standard amount used to express a measurement, such as a metre for length or a second for time.

Give numerical headings both a quantity and a unit, such as ‘Time / s’. The cells beneath then contain numbers, without repeated units.

Definition

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OCR GCSE Combined Science A · J250

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OCR GCSE Combined Science B · J260