Melting, evaporating, condensing (gas to liquid), freezing, sublimation, and deposition.
The identity of the property does not change so the physical properties change but not the chemical
Yes, it is a physical change. For if it was a chemical change, it would not be able to change back; but when you are just changing the state of the item/substance it can be changed back.
Yes
Yes, because the chemical composition remains unchanged. Water is still H2O whether it is solid, liquid or a vapour.