1. Introduce the idea of building a model of the water cycle. Remind students that they have seen and used drawings and animations as models of a solid, liquid, and gas. Tell students that they will ...

The water cycle follows a cycle of evaporation, condensation, precipitation and collection. Water on Earth is always moving. It is constantly being recycled. This is called the water cycle.

Glaciers are melting faster than ever. As the planet gets hotter, our frozen world is shrinking, making the water cycle more unpredictable. For billions of people, meltwater flows are changing ...