1. Today’s Agenda….10/3 Bellringer: True or False Review Physical Changes
Notes on Chemical Changes
Physical and Chemical Changes Checklist

2. Today’s Goals…
I can classify changes in substances as physical or chemical.

3. Chemical Changes
Study Pack #4

4. Observing a Chemical Change
BEFORE
CHANGE
AFTER
ADDING BAKING SODA TO VINEGAR

5. Chemical Changes Change in appearance and composition
Result in a NEW substance
Not easily reversed

6. Examples: Wood burning Iron rusting Silver tarnishing Cooking/Baking
Foods spoiling
Leaves changing colors in the fall

7. Signs of a Chemical Change
How do you know a change has occurred?
Gas bubbles
Producing heat, light, smoke
Change in color
Change in odor
Sound