A block of wood has a mass of 300 grams and a volume of 150 cm³. Calculate the density of the wood (Density of materials)

The density of the wood is 2 g/cm³.

Evidence lens: Use the data, graph feature, practical observation, or particle behaviour that proves the answer. This question asks: A block of wood has a mass of 300 grams and a volume of 150 cm³. Calculate the density of the wood (Density of materials). The correct response is The density of the wood is 2 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 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 9 is distinct because it uses this exact question context and the evidence lens rather than a generic particle-model sentence.