If a solid has a mass of 200 grams and a volume of 50 cm³, what is its density (Density of materials) ? P43-063 Density of materials checkpoint

The correct answer is 4 g/cm³ ? P43-063 density measurement and calculation.

Graph lens: Read the trend, flat section, gradient, or axis labels before explaining the physical meaning. This question asks: If a solid has a mass of 200 grams and a volume of 50 cm³, what is its density (Density of materials) ?. The correct response is 4 g/cm³ ? P43-063 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 define density as mass per unit 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 3 is distinct because it uses this exact question context and the graph lens rather than a generic particle-model sentence.