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SI units, prefixes and standard form
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Why SI units matter

Why SI units matter

A physical quantity is something you can measure, such as length, time or current. A unit tells you the scale of that measurement, so a number without a unit is incomplete.

SI units, prefixes and standard form Lesson

  1. GCSE
  2. /Combined Science
  3. /SI units, prefixes and standard form

Step-by-step lessons on Edexcel GCSE Combined Science SI units, prefixes and standard form. Each one builds up to exam-style questions.

Lessons