Explain, using examples, of the differences between a physical change and a chemical change

The difference between a physical reaction and a chemical reaction is composition. In a chemical reaction, there is a change in the composition of the substances in question; in a physical change there is a difference in the appearance, smell, or simple display of a sample of matter without a change in composition. hope it helps! <3

Not a  mixture of two common elements that can be separated by physical means.