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This activity has been renamed "A Scientific Investigation – What types of food contain starch and protein?" to clarify the purpose of this activity, which is designed to enhance student understanding of the scientific method. Students carry out key components of a scientific investigation, including developing experimental methods, generating hypotheses, designing and carrying out experiments to test these hypotheses and, if appropriate, using experimental results to revise the hypotheses. The questions and logic have been clarified in the revised Student Handout. Additional suggestions for class discussion and links to other resources for teaching about the scientific method have been included in the revised Teacher Preparation Notes.