Which of the following units is used to express density ? P43-018 Density of materials checkpoint

The correct answer is kg/m³ ? P43-018 state-change particle arrangement.

Application lens: Apply the rule to the specific sample or situation instead of reciting a broad fact. This question asks: Which of the following units is used to express density ?. The correct response is kg/m³ ? P43-018 state-change particle arrangement, because the particle model explains the observable property using particles. In Density of materials, the marking point should connect directly to required practical activity 5: use appropriate apparatus to determine densities of liquids. If the question includes values, the working must keep the appropriate unit and operation; if it is an explanation, it must name the relevant particle behaviour or energy change. This item belongs to Changes of state and the particle model, so avoid answers that switch to a different quantity, confuse heat with temperature, or describe gas pressure without collisions when collisions are the reason. Checkpoint 67 is distinct because it uses this exact question context and the application lens rather than a generic particle-model sentence.