If a solid has a mass of 200 grams and a volume of 50 cm³, what is its density (Density of materials) ? P43-054 Density of materials checkpoint

The correct answer is 4 g/cm³ ? P43-054 particle model reasoning.

Practical lens: Link apparatus, readings, and uncertainty to the exact measurement named in the objective. This question asks: If a solid has a mass of 200 grams and a volume of 50 cm³, what is its density (Density of materials) ?. The correct response is 4 g/cm³ ? P43-054 particle model reasoning, because the particle model explains the observable property using particles. In Density of materials, the marking point should connect directly to compare densities of materials using calculated or measured values. 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 110 is distinct because it uses this exact question context and the practical lens rather than a generic particle-model sentence.