The kinetic theory model
The kinetic theory model

Kinetic theory explains the properties of solids, liquids and gases using particles. It considers three features: the separation of the particles, their arrangement, and how they move.
Step-by-step lessons on Edexcel GCSE Physics 14.1 Density and states of matter. Each one builds up to exam-style questions. Master the required practical work and core equations early, since both papers can draw on content and maths skills from across the whole specification.