Describe how to determine the density of a liquid using a balance and measuring cylinder.

To determine the density of a liquid, first measure the mass of an empty measuring cylinder using a balance. Then, fill the cylinder with the liquid and measure the new mass. The density can be calculated by dividing the mass of the liquid by its volume, which is indicated on the measuring cylinder.

Boundary lens: Keep this separate from nearby specification points that use similar words but test a different idea. This question asks: Describe how to determine the density of a liquid using a balance and measuring cylinder. The correct response is To determine the density of a liquid, first measure the mass of an empty measuring cylinder using a balance. Then, fill the cylinder with the liquid and measure the new mass. The density can be calculated by dividing the mass of the liquid by its volume, which is indicated on the measuring cylinder., 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 70 is distinct because it uses this exact question context and the boundary lens rather than a generic particle-model sentence.