Learning objective
Use approximate values to check whether a calculated answer is realistic.
Read the explanation, check the common trap, then practise with flashcards and questions.
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Topic
Estimation of physical quantities
Subtopic
Orders of magnitude and sensible estimates
Aqa A Level PhysicsMeasurements and their errors
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Quick explanation
Use approximate values to check whether a calculated answer is realistic
- This point belongs to Estimation of physical quantities, especially Orders of magnitude and sensible estimates.
- You need to be able to use approximate values to check whether a calculated answer is realistic.
- The key ideas to know are whether, calculated, and values.
- Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.
Key concepts
whethercalculatedvaluesapproximatecheck
Why it matters
This objective helps connect Orders of magnitude and sensible estimates to exam-style questions, flashcards, and revision notes for Estimation of physical quantities.
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Revision notestopic notes
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Open revision notesRelated learning objectives
- Make sensible order-of-magnitude estimates for physical quantities.
Orders of magnitude and sensible estimates
- State assumptions used in estimation problems.
Orders of magnitude and sensible estimates
- Compare estimated and calculated values using appropriate reasoning.
Orders of magnitude and sensible estimates