A physical change is a change in matter that involves no chemical reaction. When a substance undergoes a physical change, the composition of its molecules remains unchanged, and the substance does...
The state of matter of a element or compound is linked to its melting and boiling points which are both physical properties. Also if the element/compound is a solid you could say physical properties...
Changing state is a physical change. The chemical composition of the substance doesn't change, only the form the substance takes. Liquid water changing to ice is still water-- the chemical...