1. Digestive System Notes
Physical & Chemical Changes

3. What is a physical change?
The object may look different, but NO new substance is made.
Different Shape
Different Size
Different State
(Solid, Liquid, Gas)
What is a physical change?

4. What is a chemical change?
Two substances combine to make something NEW!
Start and end with two different materials
Can’t reverse or change back

5. Label each organ, and if it has chemical or physical changes occur during digestion.

6. Label each organ, and if it has chemical or physical changes occur during digestion.
Mouth: Chewing (Physical)
Saliva (Chemical)
Stomach: Moving (Physical)
Stomach Acid (Chemical)
Large Intestine: Breaking Down (Chemical)
Small Intestine: Breaking Down (Chemical)

7. Processing Questions: WRITE THE QUESTION.
The difference between a physical change and chemical change is that _________________________.
Food that has been chewed up is an example of a ________________ change because ______________.
Food that has been vomited up is an example of a ________________ change because ______________.