The definition of physical change

The definition of physical change is a change in a substance that does not cause a change in the chemical composition of the substance. Thus, the arrangement of the atoms compound remain, such as changes in the form of substances, changes in the length and volume changes.

 
For example, frozen into the ice melts, the water to evaporate (moisture), frozen,
If we review the composition of the molecule, then the things that always kept H2O. despite changing states of matter. characteristic of the process of physical changes go round behind, these substances can be restored to its original form.