a chemical change is a change that occurs when one or more substances change into entirely new substances with diffident properties. example of a chemical change is when you bake cake. after you put it in the oven and bake it, you cant put it back from where it was being made. a physical change is a change of matter from one from to another without a change in chemical properties. an example of a physical change is when you put mint inside a soda. it will explode right? that's because the substances that the mint has has an effect on the soda.