Wednesday, November 11, 2009
Biology: Playing with Proteins
This week we took the first few minutes to analyze the results from our investigations into organic compounds. It's a credit to your kids' ability to record data carefully, that they were able to analyze the results 2 weeks later in order to figure out which foods contain protein, starch, simple sugars, and fats.
The main focus of science this week was to observe reactions between the enzyme catalase and hydrogen peroxide. After discovering that the catalase in potatoes causes hydrogen peroxide to break down into water and oxygen, the kids designed experiments to test other substances for the presence of of this enzyme. The kids chose a wide range of substances to test including chocolate, avocado, lemon, grass, and Pringles. Sadly, unlike with regular potatoes, hydrogen peroxide had little to no effect on the Pringles.