My hypothesis was that the hydrogen peroxide, potassium iodide and yeast will have a chemical reaction which will be a foamy substance. My results supported my hypothesis. There was a chemical reaction after mixing hydrogen peroxide, yeast and potassium iodide and the substance that flowed from the glass jar was foaming. The foamy substance continued for minutes. Next time I do this experiment I want to add more of everything just to see if the reaction will be bigger.