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This activity explores the basic workings of a siphon, which is the core technology that makes toilets work.

In this activity, learners will model the mechanical weathering and erosion of rocks in a stream or river.

This hands-on experiment will provide learners with an understanding of the issues that surround environmental cleanup.

In this activity (on pages 29-35), learners examine water pollution and filtration.

In this physics activity (page 10 of the PDF), learners will explore how energy from moving water can be used.

Learners explore the variables that affect the properties of ice and the places where different types of ice are found.