What are examples of physical changes? Chemical changes?
Physical changes are largely changes of state.......
Physical changes are largely changes of state: solid to liquid to gas, etc. Chemical change involves the formation of new substances and the making and breaking of strong chemical bonds. There should be many examples of these processes on these boards, and in your text.
They includes the reactions that takes place with the element.
For example, metal reacts with acid to cause a change in its properties