Question

when. a. change. occurs​

Answer 1

Explanation:

Physical changes occur when objects or substances undergo a change that does not change their chemical composition. This contrasts with the concept of chemical change in which the composition of a substance changes or one or more substances combine or break up to form new substances.

Answer 2

Answer:

Physical changes occur when objects or substances undergo achange that does not change their chemical composition. This contrasts with the concept of chemical change in which the composition of a substance changesor one or more substances combine or break up to form new substances.

Explanation:

Hope it will helps you.