Using a whimsical model made of a tiny staircase, wind-up penguins, and a bicycle tire, Bill Nye demonstrates the phases of the water cycle: evaporation, condensation, precipitation, and collection.

Teacher's guides available under Additional Info tag. In English with optional Spanish language track.

11 segments include:. Introduction. The Hydrological Cycle. A Clever Science Trick. Molecule Moments. Who's the Scientist?. Cool Science Experiment: Making a Cloud. Water Cycle Model. Precipitation and Collection. The Importance of Water. J.A.C. "Water Cycle Jump". Conclusion.