Here's why:
* Below the melting point (0°C or 32°F): Water exists as a solid, known as ice. The molecules are tightly packed in a crystalline structure.
* At the melting point: The molecules gain enough energy to break free from their rigid structure and start moving around more freely.
* Above the melting point: Water transitions to a liquid state. The molecules are still close together but can move around more readily.
So, while other properties like density, viscosity, and heat capacity might also change, the fundamental change is the transition from solid to liquid.
