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GCSE Combined Science · key term
A word or symbol placed before a unit to indicate a particular multiplier, such as kilo (k), meaning .
Used by OCR
Specification WS1.4d · Biology Paper 1, Biology Paper 2, Chemistry Paper 1, Chemistry Paper 2, Physics Paper 1, Physics Paper 2
Revise: Orders of Magnitude and PrefixesPowers of ten and unit prefixes provide two connected ways to express these sizes clearly.
Prefix symbols are case-sensitive: M means mega, but m means milli. Kilo uses lower-case k.
Do not assume neighbouring prefixes always differ by a factor of 1000: centi and milli differ by a factor of 10.
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