Which unit is used to express density in the metric system ? P43-036 Density of materials checkpoint

The correct answer is Both kg/m³ and g/cm³ ? P43-036 state-change particle arrangement.

Comparison lens: State both sides of the comparison so the contrast is explicit rather than implied. This question asks: Which unit is used to express density in the metric system ?. The correct response is Both kg/m³ and g/cm³ ? P43-036 state-change particle arrangement, 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 make and record measurements needed to determine densities of regular solid objects. 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 53 is distinct because it uses this exact question context and the comparison lens rather than a generic particle-model sentence.