Sixth graders explore physical and chemical changes. In this physical science activity, 6th graders study vocabulary, discuss the changes they see in the world and look up information on chemical and physical changes. Students create...

Students explore enzyme catalysis through a series of experiments. In this chemistry lesson plan, students determine the factors affecting catalysis. They explain the different uses of this process.

Students observe a teacher demo on how clouds form. In this earth science instructional activity, students discover how cloudiness affects relative humidity. They explain the scattering of light by clouds.