Answer:
The difference between chemical and physical changes is that a chemical change happens whenever there is a change in the molecule of a substance. Chemical changes always make a new substance and could never go back to how it was before. In a chemical change, the energy causes the atoms to break free of their molecules and form different molecules.
A physical change never forms a new substance, for example, if you cut an apple in half it will still be an apple because it did not form a new substance or it does not have mold or anything on it that will not be able to change back to what it was before. The type of physical changes is texture, shape, temperature, and a change in the state of matter.
So the difference between them is that a chemical change can never go to what it was before but a physical change can.