Examples: Change in State: Melting of ice into water and freezing of water into ice are physical changes because the chemical composition of water (H₂O) remains unchanged. Changes in Shape or ...

Explains chemical changes, which occur when two or more materials combine to form new substances. It describes various examples of chemical changes, such as burning wood, digestion, and ...

They involve the formation of new chemical elements or compounds. Physical properties ... - in a physical change, a substance simply changes physical state. For example, from a solid to a liquid.

Chemical Change: In a chemical change, the arrangement of atoms within the substance is fundamentally altered, which leads the substance to change its shape. Bujrni9ng of wood can be a good example.