Required practical activity 5: use appropriate apparatus to determine densities of liquids.

Required practical activity 5: use appropriate apparatus to determine densities of liquids. Comparison lens: State both sides of the comparison so the contrast is explicit rather than implied. In Density of materials, this means the particle model explains the observable property using particles. The answer should use the approved wording from Changes of state and the particle model, include liquid, 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 10 is specific to required practical activity 5: use appropriate apparatus to determine densities of liquids and does not reuse a generic explanation from a neighbouring objective.