Question

question 1. a change is a change in a substance that does not involve a change in the identity of a substance. an example of this type of change is.

Explanation:

A physical change only affects the physical properties like state (solid - liquid - gas) or shape of a substance, without altering its chemical composition. Examples include melting ice (solid water turning to liquid water), where water remains as $H_2O$ throughout the process.

Answer:

Physical; melting ice (answers may vary for the example, other common ones like boiling water, breaking glass also work)