P.O.C.E.

• PREDICT: What you can observe during a chemical reaction • OBSERVE:

1. http://www.youtube.com/watch?v=nN8xD_bv2aQ (whole video)2. http://www.youtube.com/watch?v=R6bBs2D0cpA (0:00 - 0:56)3. http://www.youtube.com/watch?v=UclxSfPoapc (0:52 - 1:22)4. http://www.youtube.com/watch?v=ezsur0L0L1c (whole video)

• CLAIM: Mixing baking soda and vinegar is an example of a chemical reaction.

• EVIDENCE: Students describe how they know that the claim is true.