Physical vs. Chemical Change pg 87 Bpop Physical Change- 1) Only physical properties change. Chemical properties do not change. 2) Physical changes are generally easy to reverse. 3) No energy is produced by the substance. Chemical Change1) Both physical and chemical properties are changed. 2) Changes are not reversible without another reaction. 3) Energy is often produced ( fire or heat, for example). Most chemical changes will have one or more of the following: Heat Burning Color without you adding it Odor Gas given off Law of Conservation of Mass Matter may change form, it can not be created or destroyed http://www.brainpop.com/science/matte randchemistry/conservationofmass/ Bpop quiz Let’s test your knowledge Pick an apt clock to work with Every group gets a whiteboard Have 30 sec to 1 min Then 321 show! Baking Chemical Change Mashing potatoes Physical Change Ripping a page Rotting an apple Chemical Change Adding food coloring to Physical Change Chewing food Physical Change Digesting food Chemical Change An ice cube melting Physical Change Mixing salt in water Physical Change Two clear liquids are mixed and a white color forms Chemical Change Water turning to vapor Physical Change Mixing salt and sugar Physical Change The reason the Statue of liberty is green Chemical Change Respirati on Chemical Change Photosy nthesis Chemical Change Practice time!