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Micrometre (µm) — OCR GCSE Combined Science B Definition

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Combined Science
Key terms
Micrometre (µm)

GCSE Combined Science · key term

Micrometre (µm)

Definition

A unit of length equal to $10^{-6}$ metres. There are 1000 micrometres in one millimetre.

Used by OCR

How each exam board covers it

OCR GCSE Combined Science B · J260

Biology, Combined Science

Micrometres are useful for cell dimensions, while nanometres are useful for still smaller structures.
Revise: Electron Microscopy Applications

OCR Combined Science B past papers

Related key terms

Electron microscope
Estimate
Magnification
Nanometre (nm)
Resolution

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Sub-cellular structure