Digestion in the Mouth October 8, 2012 Using the Digestion in the Mouth activity from the Carolina Human Body Systems Curriculum http://www.carolinacurriculum.com/premium_content/eBooks/Human+Body/pdfs/Lesson_4.pdf Objectives in the curriculum: Students will begin to construct a definition of the word enzyme. Students will explore chemical digestion in the mouth. Students will explore mechanical digestion in the mouth. My objective(s): SWBAT explain the role of amylase in digestion in the mouth (breaks down starches into sugar). Do Now: Elicit: Answer the following questions on the next empty page (page 17 or 18) of your notebook.

1. What do you think would happen to the food in your mouth if you had no saliva? 2. What do you think would happen to the food in your mouth if you had no teeth?

Students will have 5-10 minutes to write. Then we will have a discussion as a class. Engage Give each student a cracker and have them eat it (slowly and following teacher directions). Then they will write (in their notebook) a description of what happened as they chewed and swallowed the cracker. Students will share with a partner what they observed about what happened when they chewed and swallowed the cracker. Then we will share out and discuss it as a group. Explore Explain purpose for todayʼs lab (learn about digestion in the mouth) and explain objective (above). Divide students into pre-designated groups (~3 students per group) Go through the lab with the students. I will model it up front as they do it at their desks. Students will mix amylase (the enzyme in our mouths) with starch and then

perform starch and sugar tests with Lugol and Benedictʼs Solution.

Students will record their data in their data tables and then clean up their lab area. Explain At the end of class, we will discuss the results, emphasizing that the amylase broke the starch down into sugars. Before students leave, they will answer the exit slip question. Exit slip/Evaluate What does amylase do in our mouths? Why do you think this?