Here are the recap videos from the Particle Model of Matter Section from our GCSE Physics Snapshots Booklet.

PM.1 - Density:

 

PM.2 - Determination of Density:

 

PM.3 - Internal Energy:

 

PM.4 - Changes of State:

 

PM.5 - Particle Motion in Gases:

 

PM.6 - Changing the Pressure of a Gas: