A block of wood has a mass of 300 g and a volume of 0.5 dm³. What is the density of the wood (Density of materials)

The correct answer is 600 kg/m³.

Cause lens: Name the cause, then state the effect on particles, pressure, density, or energy. This question asks: A block of wood has a mass of 300 g and a volume of 0.5 dm³. What is the density of the wood (Density of materials). The correct response is 600 kg/m³, 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 100 is distinct because it uses this exact question context and the cause lens rather than a generic particle-model sentence.