This resource is aimed at KS3 students and is useful as it covers the following learning objectives...
State that particles move through fluid by diffusion
Describe diffusion in terms of the particle model
Explain how diffusion occurs in terms of the particle model
Suggest how the rate of diffusion may be affected
There are differentiation opportunities for lower and higher ability students (check the green challenge questions). I have also included feedback boxes, in which you should put students names to keep individuals engaged and ready to learn and feedback.