10-28-08 Midterm Presenatations Continued

We continued our midterm presentations in class today. We had presentations about mixtures, and elephant toothpaste. These two presentations have been the two most ineresting thus far. The mixtures activity creatred "Ooblak" which is a mixture of cornstarch and water that is really cool! The elephant toothpaste was also very exciting because it used yeast and hydrogen peroxide to create a chemical reaction with ALOT of foam. Very fun class today.