(Physics only) Explain how changing the volume of a fixed mass of gas changes the frequency of particle collisions with container walls.

(Physics only) Explain how changing the volume of a fixed mass of gas changes the frequency of particle collisions with container walls. Evidence lens: Use the data, graph feature, practical observation, or particle behaviour that proves the answer. In Pressure in gases (physics only), this means density links mass and volume, so the answer must preserve which quantity is being calculated. The answer should use the approved wording from Particle model and pressure, include volume, fixed mass of gas, container, and avoid drifting into another section of Particle model of matter. For revision, practise saying the exact objective aloud, then add the one calculation, particle movement, collision, graph, or practical detail that makes the statement true. A strong exam response for checkpoint 74 is specific to (Physics only) Explain how changing the volume of a fixed mass of gas changes the frequency of particle collisions with container walls and does not reuse a generic explanation from a neighbouring objective.