Final answer:
The freezing point and melting point of water are the same because they represent the temperature at which water transitions between its solid and liquid states.
Step-by-step explanation:
The freezing point and melting point of water are the same because they represent the temperature at which water transitions between its solid and liquid states. At this temperature, the solid and liquid forms of water are in equilibrium. In the case of water, the freezing/melting point occurs at 0°C. This means that when we cool down liquid water below 0°C, it will freeze into ice, and when we heat up ice above 0°C, it will melt back into liquid water.
For example, if we cool down liquid water at room temperature, it will start to freeze when it reaches 0°C. At this temperature, both liquid and solid water coexist until all the liquid water has frozen into solid ice.
Similarly, if we heat up ice, it will start to melt at 0°C. At this temperature, both solid and liquid water coexist until all the solid ice has melted into liquid water.