Answer:
A physical change in a substance doesn't change what the substance is. It can possibly melt or freeze an object. I mean heat makes things expand while cooling makes them retract.... In chemical change where there is a chemical reaction, a new substance is formed and energy is either given off or absorbed.
Explanation:
This is NOT what I wrote austinmfn100 wrote this so give credit to that person not me was just wanting to help you guys.
