A cube of wood has a mass of 400 g and a volume of 500 cm³. What is its density (Density of materials) ? P43-055 Density of materials checkpoint

The correct answer is 0.8 g/cm³ ? P43-055 density measurement and calculation.

Particle lens: Describe arrangement, motion, spacing, collisions, or energy changes only when they are relevant here. This question asks: A cube of wood has a mass of 400 g and a volume of 500 cm³. What is its density (Density of materials) ?. The correct response is 0.8 g/cm³ ? P43-055 density measurement and calculation, 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 calculate density when mass and volume are known. 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 24 is distinct because it uses this exact question context and the particle lens rather than a generic particle-model sentence.