Chemical Reactions 2 3 What is a chemical reaction? It is the process by which one or more substances undergo change to produce one or more different substances. These new substances have different chemical and physical properties from the original substances. 4 Rusting Metal Burning toast Fireworks exploding Digesting food Some clues to Chemical Reactions 5 Braking and making bonds New substances are formed in a chemical reaction because chemical bonds in the starting substances break, atoms rearrange, and new bonds form to make the new substances. 6 A picture is worth a thousand words 7 Thanks! Any questions? You can find me at: rmalvarado@brassavolaschool.com 8