Describe how the density of a liquid can be determined using a balance and a measuring cylinder.

To determine the density of a liquid, first measure its mass using a balance. Then, pour the liquid into a measuring cylinder to measure its volume. Finally, calculate the density using the formula density = mass/volume.

Definition lens: Give the precise definition, then add a context sentence that shows how it is used. This question asks: Describe how the density of a liquid can be determined using a balance and a measuring cylinder. The correct response is To determine the density of a liquid, first measure its mass using a balance. Then, pour the liquid into a measuring cylinder to measure its volume. Finally, calculate the density using the formula density = mass/volume., because gas pressure comes from particle collisions with container walls. In Changes of state, the marking point should connect directly to use the particle model to explain why gases are less dense than solids or 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 198 is distinct because it uses this exact question context and the definition lens rather than a generic particle-model sentence.