A chemical change is a process in which the atoms of a substance are rearranged that often results in a change in form of matter
An example of a chemical change would be burning wood.
Another example of a chemical change would be digesting food. Eating can also be a physical change when you are crushing the sandwich with your teeth, but it becomes chemical when your syliva begins to break it down
A third and final example of a chemical change would be fireworks.
A physical change is a process a substance undergoes that does not rearrange its atoms
An example of a physical change would be crushing a piece of paper. An example would be cutting the paper too.
A final example of a physical change would be sugar dissolving in coffee.