Bill Nye takes viewers on a tour of a steel mill to help demonstrate that matter exists in three phases - solids, liquids, and gases.

Teacher's guides available under Additional Info tag.

14 segments include: Introduction. Three Phases of matter. Nifty Home Experiment: Phase Changes. Liquid Nitrogen. The Absolute Zero Hour. Nifty Home Experiment: Another Phase Change. Hey! Look At This!: Carbon Dioxide. Way Cool Scientist - Maggie Stead. Great Phases of Matter. A Clever Science Trick. Phaze Change "Solid Liquid Gas". Check It Out!: Different Phases. Conclusion. "The Story of Johnny Atom".