Here's why:
* Density is key: The relationship between mass and volume is determined by density. Density is mass per unit volume (D = M/V).
* Different densities: Solids and liquids can have different densities. For example, ice (solid water) is less dense than liquid water, which is why ice floats.
* Exceptions: There are many solids that are denser than their liquid forms. For example, iron is denser in its solid form than in its liquid form.
In general:
* Solids are usually denser than their corresponding liquids. This is because the molecules are packed closer together in a solid state.
* However, there are exceptions to this rule. The density of a substance depends on its specific chemical composition and molecular structure.
