* Melting: This is the process of a substance transitioning from a solid to a liquid state. It happens when the substance absorbs enough energy (usually heat) to overcome the forces holding its molecules in a fixed, rigid structure.
* Freezing: This is the opposite process, where a substance transitions from a liquid to a solid state. It happens when the substance loses enough energy (usually heat) so that its molecules slow down and are able to form a more ordered, rigid structure.
Therefore, the temperature at which a substance melts is the same temperature at which it freezes.
Example: Water melts at 0 degrees Celsius (32 degrees Fahrenheit) and freezes at the same temperature.
However, it's important to note that the processes of melting and freezing are different:
* Melting: Energy is *absorbed* by the substance.
* Freezing: Energy is *released* by the substance.
This is why you feel the cold when ice melts, even though the temperature remains the same. The ice is absorbing heat from your hand to melt.
