Starch and Protein Investigation

In this activity students design and carry out two experiments in a sequence that illustrates important aspects of the process of science; students analyze the data from the first experiment to generate hypotheses which are tested in the second experiment. The first experiment evaluates two indicator solutions to see whether they can be used to test for starch and/or for protein. Then, students use the results from the first experiment to formulate hypotheses concerning what types of food contain starch or protein – some or all foods derived from animals or plants or both. Finally, students design and carry out a second experiment to test their hypotheses and use the data to evaluate and, if necessary, modify their hypotheses.

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We invite comments on this hands-on activity, including suggestions for other teachers who are planning to use the activity and any questions you have. If you would prefer to send your comments or questions in a private message, please write Ingrid Waldron at iwaldron@sas.upenn.edu