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Some animals can swallow food whole, but humans have to chew. In this activity, learners will investigate what saliva does chemically to food before we even swallow.

In this activity on page 7 of the PDF (Chemistry—It’s Elemental), learners use iodine to identify foods that contain starch.

In this activity on page 2 of the PDF, learners test different materials to find out which is the best insulator.

In this simulation, learners act out each digestive function of the organs, tissues, and cells in the digestive tract.