Which statement correctly describes the particle arrangement in solids compared to liquids (Changes of state)

The correct answer is Solids have particles that are closely packed and vibrate in fixed positions..

Comparison lens: State both sides of the comparison so the contrast is explicit rather than implied. This question asks: Which statement correctly describes the particle arrangement in solids compared to liquids (Changes of state). The correct response is Solids have particles that are closely packed and vibrate in fixed positions., because changes of state are explained by particle energy and arrangement. In Changes of state, the marking point should connect directly to explain that the material recovers its original properties if a change of state is reversed. 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 185 is distinct because it uses this exact question context and the comparison lens rather than a generic particle-model sentence.