Diffusion

Diffusion gives you four interactive animations to simulate the common classroom experiments. You’ll use it to cover:
•	How common observations of diffusion relate to the particle model
•	How diffusion occurs in liquids and gases
•	How diffusion explains what happens when coloured crystals dissolve
•	Why a liquid evaporates more quickly into vacuum than into a gas
•	How and why temperature affects the rate at which diffusion occurs.