All common household or classroom materials can be saved or disposed of in the usual manner. 1. Introduce the idea of building a model of the water cycle. Remind students that they have seen and used ...

But they can also disrupt the delicate water cycle ... waste water. Urbonas says communities there must focus first on developing a proper wastewater treatment system, using more complex models ...

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 ...