A physical change is a type of change in which the form of matter is altered but one substance is not transformed into another. The size or shape of matter may be changed, but no chemical reaction occurs.
A chemical change is any change that causes a new substance to be formed.
The example of physical changes is states of matter. Some of the processes that cause physical changes include cutting, bending, dissolving, freezing, boiling, and melting.
The examples of chemical changes are rotting, burning, cooking, and rusting are all further types of chemical changes because they produce substances that are entirely new chemical compounds.