Which of the following units is used to express density ? P43-040 Density of materials checkpoint

The correct answer is kg/m³ ? P43-040 density measurement and calculation.

Practical lens: Link apparatus, readings, and uncertainty to the exact measurement named in the objective. This question asks: Which of the following units is used to express density ?. The correct response is kg/m³ ? P43-040 density measurement and calculation, because density links mass and volume, so the answer must preserve which quantity is being calculated. In Density of materials, the marking point should connect directly to recall and apply the equation density = mass divided by volume. 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 14 is distinct because it uses this exact question context and the practical lens rather than a generic particle-model sentence.