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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 on Edexcel IGCSE Physics Units. Each one builds up to exam-style questions. Build a strong foundation in mechanics and electricity before tackling the more mathematically demanding astrophysics and nuclear topics.

Lessons