A block of metal has a mass of 300 g and a volume of 100 cm³. Calculate the density of the metal (Density of materials)

3 g/cm³

Definition lens: Give the precise definition, then add a context sentence that shows how it is used. This question asks: A block of metal has a mass of 300 g and a volume of 100 cm³. Calculate the density of the metal (Density of materials). The correct response is 3 g/cm³, 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 apply MS 1c and MS 3c skills when using standard form, significant figures and rearranging the density equation. 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 102 is distinct because it uses this exact question context and the definition lens rather than a generic particle-model sentence.