The process where solid changes to gas without passing the liquid state is called Vaporization

Some solids melt at room temperature

Changes in temperature can cause physical change

Physical changes are not observable but they are reversible

All matter change when exposed to certain conditions

The process of changing solid to liquid is called melting

Liquids solidify during the process of freezing

The process where liquid changes to gas is called sublimation

Condensation is a process where gas is changed into a solid

Freezing point is the temperature at which a substance changes from liquid to solid