Here's why:
* Specific Gravity: Specific gravity is the ratio of the density of a substance to the density of a reference substance, usually water at 4°C. It's essentially a measure of how dense a substance is compared to water.
* Density: Density is a measure of mass per unit volume. The arrangement of molecules in a substance directly affects its density.
* States of Matter:
* Solid: Molecules in solids are closely packed and have a fixed arrangement. This tight packing results in a higher density.
* Liquid: Molecules in liquids are more loosely packed than solids, allowing them to move around more freely. This results in lower density compared to the solid state.
* Gas: Molecules in gases are widely spaced and move randomly. The low density of gases is a consequence of this.
Therefore, the specific gravity of a substance will generally be higher in its solid state compared to its liquid or gaseous state because the density is higher in the solid state.
Example: Ice (solid water) has a lower specific gravity than liquid water. This is why ice floats on water.
