Which of the following is the most appropriate way to record the mass of a liquid using a balance and a measuring cylinder (Density of materials)

The correct answer is Weigh the empty cylinder, then weigh the cylinder with liquid and subtract the empty weight.

Practical lens: Link apparatus, readings, and uncertainty to the exact measurement named in the objective. This question asks: Which of the following is the most appropriate way to record the mass of a liquid using a balance and a measuring cylinder (Density of materials). The correct response is Weigh the empty cylinder, then weigh the cylinder with liquid and subtract the empty weight, 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 apply AT 1 and AT 3 skills when measuring mass and 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 98 is distinct because it uses this exact question context and the practical lens rather than a generic particle-model sentence.