Question

. . A _____ change occurs when a substance changes phase.. . physical. chemical. nuclear

Answer 1

A PHYSICAL change occurs when a substance changes phase

Step-by-step explanation:

I did this on oddyseyware

Answer 2

A physical change is a change when a substance phases changes only. A chemical change is a change where a substance upon applying conditions or adding another substance to it, changes into a wholly new product. Hence the answer to this problem is physical change.