what is physical change
A physical change is one which involves changes in the physical properties of a substance such as state, shape, size, and colour etc. No new substances are formed in a physical change. Also the original substance can generally be recovered again in a physical change i.e. most physical changes are reversible. For example, breaking of glass, melting of ice, etc.
physical change can be defined as the change in which no new substance is formed i.e the chemical composition of the substance don not change.eg ice, it is a solid form of water which can be changed into liquid when kept at a room temperature and again can be freezed to form ice. therefore,melting of ice is a physical change and all physical changes are reversible changes whereas burning of paper is a chemical change as paper when burnt and can not be regained again