1. Changes and Law p. I. Changes A.Physical – changes the appearance but the substance stays the same 1. Crushing a Soda Can 2. Melting Butter 3. Taking the pulp out of o.j. B.Chemical – the substance reacts and becomes something new 1. Wood burning in a fire and becomes ash 2. Sugar melts and becomes caramel

2. Signs of Chemical Reactions p. 6 1.Bubbles 2. Color Change 3. Temperature Change 4. Precipitate – a new, thicker substance 5. Bright Light

3. II.Law of Conservation of Mass/Matter A. Matter/Mass cannot be created or destroyed B. Atoms are not lost or gained, they are only rearranged. Zip Lock Lab: 1. Baking Soda + Vinegar = Carbon Dioxide + Water + Sodium acetate

4. Reaction #1 Lab: Bubbles Reaction #2 Lab: Color Change Temperature Change Precipitate P/C Lab: Color Change Bubbles Reaction Rate Lab: Bubbles Temperature Change Electrolysis of CuSO 4 Lab Color Change Bubbles