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Straining Out the Dirt
Learners take on the role of environmental engineers as they design water filters.
Oh Buoy!
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Learners work in pairs to design, construct, and test a device that exhibits positive, neutral, and negative buoyancy. They test a number of different objects in water to see if they sink or float.
Walk On Water Bugs
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In this activity (on pages 29-35), learners examine water pollution and filtration.
Runaway Runoff
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When it rains, water can collect on top of and seep into the ground. Water can also run downhill, carrying soil and pollution with it.
Water Treatment
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Water treatment on a large scale enables the supply of clean drinking water to communities.
Crumple a Watershed
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Learners gain an intuitive knowledge of the physical aspects of watersheds by creating their own watershed models.