When determining the density of a liquid, which apparatus is typically used (Density of materials)

The correct answer is Measuring cylinder and balance.

Method lens: First identify the measured quantity, then match the equation or particle idea to the command word. This question asks: When determining the density of a liquid, which apparatus is typically used (Density of materials). The correct response is Measuring cylinder and balance, 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 determine densities of liquids. 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 68 is distinct because it uses this exact question context and the method lens rather than a generic particle-model sentence.