Solid Facts!

How do solids and liquids change states?

Removing energy from a liquid can cause it to change to a solid as the particles stop sliding past each other. Adding energy to a solid can cause it to change to a liquid as particles begin sliding past each other. 

• By Freezing:

The change of state in which a liquid becomes a solid is called freezing. When a liquid is cooled, it particles have less energy than they did before. Eventually, the particles lock into the fixed arrangement of a typical solid.   The temperature at which a liquid substance change into a solid is the liquid´s freezing point. 

• By Melting:

When a solid is warmed, its particles have more energy than they did before. Eventually, the particles are are able to slide past one another. The change of state from a soid to a liquid is called melting. The temperature at which the substance changes from a solid to a liquid is called the melting point.