Earth's crust actress Jenna von Oy (Blossom) guest stars in this episode which finds Bill Nye going to the depths of the earth (literally) to explain how the Earths surface and its inner mantle differ.

Teacher's guides available under Additional Info tag. In English with optional Spanish language track for the DVD version only.

15 segments include:. Introduction. From Liquid to Rock to Sand. Soil Comes From Rocks. Three Types of Rocks. Rock Climbing!. Consider the Following: The Rock Cycle. Check It Out!: Student Conservation. From Rocks to Sand to Soil. Way Cool Scientist - Chuck Natsuhara. Soil Profile. The Ever Changing Earth. Hey! Look At This!: Diamonds. Nifty Home Experiment: Making Crystals. Sedimentary Fools "Rocks Rock Harder". Conclusion.