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Learners take on the role of environmental engineers as they design water filters.

In this outdoor activity, learners simulate an oil spill using popcorn (both oil and popcorn float on water), and estimate the spill's impact on the environment.

In this outdoor activity, learners race small boats, made of cork, balsa wood, popsicle sticks etc., to investigate the rate and direction of currents in a stream or creek.

Water treatment on a large scale enables the supply of clean drinking water to communities.

In this ecology activity (page 8 of the PDF), learners explore how to filter contaminated water using a variety of materials.