Mechanical & Chemical

 Key Question: Does it matter if mechanical break down occurs?  Initial Thoughts:

 Testable Question: How does the size of food affect the speed of chemical digestion?  Hypothesis:  Materials:  antacid tablets - 2  Vinegar – 5 ml per experiment  Graduated cylinder  Procedures: (write your own procedures)  Diagram: (draw a diagram)

1. What were your manipulated, responding, and control variables? 2. A) What part of digestions was modeled by breaking the tablet? B) What part was modeled by adding vinegar? 3. Besides preventing choking, why is it important to chew your food?

Minimum of 4 sentences  What was your hypothesis, and was it supported or not supported?  How did the size of food affect the speed of chemical breakdown occurs?  Explain your conclusions using your data as evidence.  How could you improve the design of your experiment? Make sure this is thoughtful and thorough.

 Draw a picture that represents mechanical digestion and chemical digestion

 Food is digested more efficiently when both mechanical and chemical digestion occurs.