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A Hole in the Ground
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Learners build models of sinkholes to gain an intuitive knowledge of their physical aspects.
Watercraft
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In this design challenge activity, learners build a boat that can hold 25 pennies (or 15 one inch metal washers) for at least ten seconds before sinking.
Walk On Water Bugs
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In this activity (on pages 29-35), learners examine water pollution and filtration.
Water Cycle in a Bag
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In this activity, learners create a biosphere in a baggie.