1. Physical and Chemical CHANGES
8th grade science

2. Warm-Up: Monday , September 8th
Q). How can I change a paper towel roll? List as many ways as you can. BE CREATIVE

3. Physical vs. Chemical Changes
To decide if a substance has undergone a physical change, you must ask, “Did the composition of the substance change?”
Composition is the type of matter in an object and the way that matter is arranged.
Physical changes DO NOT alter the composition of a substance
Chemical changes DO alter the composition of a substance.

5. Examples of Physical Changes
When matter changes size, shape or form.
Changing states of matter
Physical weathering

6. Examples of Chemical Changes
The substance that makes up an object has been changes into something else.
Digesting food
Salt
Rusty car

7. Physical vs. Chemical Changes

8. Physical or Chemical?

9. Physical or Chemical?

10. Physical or Chemical?

11. Card Group Activity

12. Exit Slip
Give an example of a physical change and a chemical change the we DID NOT use in class today. First Name Last Name PC = ___________ CC = ___________