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2.  A physical change alters the form of a substance, but does not change it to another substance. Example: Squeezing the juice from an orange

3.  When a substance undergoes a chemical change, it is changed into a different substance with different properties. Example: Baking a Cake

4. 1. Color Change 2. Precipitate Forms (the solid formed from a solution during a chemical reaction)

5. 3. Gas Produced 4. Temperature Change

6. 5. Changes in Characteristic Properties (odor, light given off)

7.  Cutting paper?  Physical

8.  Toast burning?  Chemical

9.  Ice melting?  Physical

10.  Rocket fuel burning?  Chemical

11.  Sawing wood?  Physical

12.  Metal rusting?  Chemical

13.  Disappearing puddle?  Physical

14.  Candle burning?  Chemical

15.  Dry ice?  Physical

16.  Presentation (including images except as cited below) modified from http://www.rocklin.k12.ca.us/staff/wisetta/hand outs/Physical%20or%20chemical%20changes.ppt http://www.rocklin.k12.ca.us/staff/wisetta/hand outs/Physical%20or%20chemical%20changes.ppt  Image on page 10 from http://en.wikipedia.org/wiki/Delta_IV http://en.wikipedia.org/wiki/Delta_IV  Image on page 14 from http://www.clipartbest.com/birthday-candles- pictures http://www.clipartbest.com/birthday-candles- pictures  Image on page 15 from http://joelzwilliams.blogspot.com/2012/10/the- missouri-method-of-bedbug-control.html http://joelzwilliams.blogspot.com/2012/10/the- missouri-method-of-bedbug-control.html