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Why units matter

Why units matter

Concept map linking base units such as metre, kilogram, second and temperature units to derived units such as area, volume, speed, acceleration, density, force, pressure, energy and specific heat capacity

A physical quantity is something you can measure, such as mass, pressure, or temperature. A unit is the agreed standard used to report that measurement, such as kg\text{kg}kg, Pa\text{Pa}Pa, or K\text{K}K.

Units Lesson

  1. IGCSE
  2. /Physics
  3. /Units

Step-by-step lessons covering Edexcel IGCSE Physics Units for IGCSE Physics. Each lesson works through exam-style questions in Paper 1 and Paper 2 format. Build a strong foundation in mechanics and electricity before tackling the more mathematically demanding astrophysics and nuclear topics.