Chemical and Physical
a chemical change is a change in substance. A physical change is just a change in shape form appearance and so on. A chemical change can be noticed by bubbling, change in color, production of light, as well as heat.
Chemical changes can not be reversed those of which consist of chemical properties. A physical change can which consists of physical properties. Most chemical changes are often like I said changed into a different substance. A physical change such as sugar in tea is easily reversible by evaporating the liquid leaving the particles of sugar behind.