Calculate mass when density and volume are known.

Calculate mass when density and volume are known. Particle lens: Describe arrangement, motion, spacing, collisions, or energy changes only when they are relevant here. In Density of materials, 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 Changes of state and the particle model, include density, mass, volume, 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 5 is specific to calculate mass when density and volume are known and does not reuse a generic explanation from a neighbouring objective.