Physics · AQA 7408 · Topic 3.1

Measurements and their errors

SI units and prefixes, errors and uncertainties in measurements, and estimating quantities.

  • 3 sub-topics
  • Taught in Year 12
  • 34 practice questions
  • 3 animated lessons
Practice questions (34) Lessons Worksheets All AQA Physics topics

What the specification says

Every sub-topic AQA can examine in this topic, with its reference number from the official specification. The Y12 and Y13 tags show when each sub-topic is usually taught.

  1. 3.1.1Use of SI units and their prefixesY12
  2. 3.1.2Limitation of physical measurementsY12
  3. 3.1.3Estimation of physical quantitiesY12

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Easy and medium questions from this topic, each with a worked solutions and the mark for every step. All 34 questions in this topic, free, no account needed.

Working as a physicist

Easy

SI units · Year 12 · 1 mark

  1. Which of these is an SI base unit?
    (1)

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  1. The base units are the metre, kilogram, second, ampere, kelvin, mole and candela. The others are derived from them.C: second

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Measurements and their errors

Medium

Estimating physical quantities · Year 12 · 2 marks

  1. Estimate the number of heartbeats in a lifetime, showing your reasoning.
    (2)
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  1. State sensible values for each quantity used.
  2. ≈ 70 min⁻¹ × 60 × 24 × 365 × 80 ≈ 3 × 10⁹.

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