Describe how to determine the density of a regular solid object using appropriate apparatus.

To determine the density of a regular solid object, first measure its mass using a balance. Then, calculate its volume by measuring its dimensions (length, width, height) and using the formula for volume (e.g., for a cube, V = length × width × height). Finally, use the density formula, density = mass/volume, to find the density.

Application lens: Apply the rule to the specific sample or situation instead of reciting a broad fact. This question asks: Describe how to determine the density of a regular solid object using appropriate apparatus. The correct response is To determine the density of a regular solid object, first measure its mass using a balance. Then, calculate its volume by measuring its dimensions (length, width, height) and using the formula for volume (e.g., for a cube, V = length × width × height). Finally, use the density formula, density = mass/volume, to find the density., because the particle model explains the observable property using particles. In Density of materials, the marking point should connect directly to required practical activity 5: use appropriate apparatus to make and record measurements needed to determine densities of regular solid objects. 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 55 is distinct because it uses this exact question context and the application lens rather than a generic particle-model sentence.