Explain that the force from particle collisions produces gas pressure.

Explain that the force from particle collisions produces gas pressure. Graph lens: Read the trend, flat section, gradient, or axis labels before explaining the physical meaning. 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 pressure, collision, force, 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 68 is specific to explain that the force from particle collisions produces gas pressure and does not reuse a generic explanation from a neighbouring objective.