What does a rolling ball in a tray have to do with a gas in a sealed container? Pupils compare collision counts, then use momentum changes to explain why the pressure rises when a fixed volume of gas is heated.
The editable PowerPoint is accompanied by a lesson plan and printable practical sheet. The activity, “Model collisions at a wall”, includes equipment, instructions, evidence to interpret and three questions with worked answers.
For AQA GCSE Combined Science: Trilogy, ages 14–16.
The download includes a printable gas-pressure worksheet with particle questions and fixed-volume graph practice.
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