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

The density of the wood is 2 g/cm³.

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 grams and occupies 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 identify density in kilograms per metre cubed or grams per centimetre cubed, mass in kilograms or grams and volume in metres cubed or centimetres cubed. 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 16 is distinct because it uses this exact question context and the cause lens rather than a generic particle-model sentence.