Physics A-Level
Prefixes and unit conversion
What Prefixes and unit conversion means in Physics A-Level, as defined for OCR.
Definition of Prefixes and unit conversion
Check what you remember
Read the wording for your board, then hide it and explain Prefixes and unit conversion in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
Prefixes scale the metre, for example 1 km = 10³ m and 1 nm = 10⁻⁹ m, and centimetres or millimetres are converted to metres before substituting.
Topics that use Prefixes and unit conversion
- S.I. units (OCR A-Level)
Related terms
- Avogadro constant
- Base units
- Derived units
- Dimensional analysis
- Mass and the kilogram
- Molar calculations
- S.I. base quantities
- S.I. base units
Using Prefixes and unit conversion in the exam
Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.
Practise Physics questions
Create a free account to answer exam-style questions on this topic and get feedback on your answers.
Start free
All Physics A-Level termsA week of Premium from your first lesson · Then the free plan continues · No card, no charge