Physics A-Level
Order-of-magnitude reasoning
What Order-of-magnitude reasoning means in Physics A-Level, as defined for AQA.
Definition of Order-of-magnitude reasoning
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Reference: AQA
Producing a sensible approximate value for a quantity by combining known benchmarks with simple reasoning, then rounding to one significant figure and expressing it as a power of ten.
Topics that use Order-of-magnitude reasoning
- Estimation of physical quantities (AQA A-Level)
Related terms
- Communication of assumptions and uncertainty
- Dimensional consistency and unit conversion
- estimation
- Order of magnitude
- Standard form
- Use of familiar physical benchmarks
Using Order-of-magnitude reasoning in the exam
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