* Liquid water can transition into solid ice. The water molecules slow down and arrange themselves into a crystalline structure, forming ice.
* Ice can transition into liquid water. If heat is added, the ice molecules gain energy, break free from their crystalline structure, and become liquid water again.
It's important to note that the temperature of water at 0 degrees Celsius is not always static.
* If heat is being added, the water will stay at 0 degrees Celsius until all the water is frozen.
* If heat is being removed, the water will stay at 0 degrees Celsius until all the water is melted.
This point where both liquid and solid phases can coexist is known as an equilibrium point.
