1. Changes to Matter

2. Two ways to change matter
Physical change: the substance ______________________, even if its form or state changes
Eg: chopping wood, melting ice
Chemical change: when one substance is ______________________ and has different properties
Eg: burning wood, cooking eggs

3. How would you reverse the physical changes in the pictures?
Are often (but not always) _________________
How would you reverse the physical changes in the pictures?
Chopped wood
Torn paper
Dissolved sugar

4. How do we know it’s a physical change?
Physical changes are changes to:
It does NOT change it’s chemical composition
“It still is what it was”

5. Chemical changes
Are often _________________ (can’t reverse them), but not always
Baking cookies
Car engine

6. How do we know if it’s a chemical change?
Chemical changes are when:

7. Movie
Movie on Physical and Chemical changes

8. Assignment
Worksheet on physical and chemical changes