Explain that gas particles collide with each other and with the walls of their container.

Explain that gas particles collide with each other and with the walls of their container. Unit lens: Check the units before giving the final statement so the physics quantity is not swapped. In Particle motion in gases, this means gas pressure comes from particle collisions with container walls. The answer should use the approved wording from Particle model and pressure, include gas particles, container, wall, 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 66 is specific to explain that gas particles collide with each other and with the walls of their container and does not reuse a generic explanation from a neighbouring objective.