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

In this water pollution activity, learners create pond water cultures and investigate the effects of adding chemicals or natural nutrients.

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

This activity (on page 2 of the PDF under SciGirls Activity: Water Slides) is a full inquiry investigation into speed and motion and takes place at a water park.

In this activity (on pages 18-29) learners explore the impact of the March 24, 1989 oil spill in Alaska caused by the Exxon Valdez tanker.

Learners design, build, and test models of "dragon boats" made from up to three milk cartons.

In this drawing/mapping activity, learners design plots of land while incorporating positive strategies for improving water quality.

In this activity (on page 5 of PDF), learners use dry ice and household materials to make scientifically accurate models of comets.