If the chemical properties of a substance remain unchanged and the appearance or shape of an substance changes it is called a

Physical change

Explanation:

Physical change -

It is the type of reversible change, where there is change in the state of the matter, is referred to as a physical change.

There is no chemical process involved during state change, i. e., no new substance is formed.

Hence, from the given statement of the question, the correct term is physical change.