What is the relationship between mass, volume, and density, and how can you rearrange the density equation to find mass?

Density is defined as mass per unit volume, expressed as density = mass/volume. To find mass, you can rearrange the equation to mass = density x volume.

Boundary lens: Keep this separate from nearby specification points that use similar words but test a different idea. This question asks: What is the relationship between mass, volume, and density, and how can you rearrange the density equation to find mass. The correct response is Density is defined as mass per unit volume, expressed as density = mass/volume. To find mass, you can rearrange the equation to mass = density x volume., 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 irregular 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 58 is distinct because it uses this exact question context and the boundary lens rather than a generic particle-model sentence.