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Drain Game
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In this activity (on pages 36-39), learners make a model of a watershed out of paper, then run water down the mountain to simulate how rainfall and pollution affect watersheds.
My Solar System
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In this online activity, learners build their own system of heavenly bodies and watch the gravitational ballet.
Disappearing Statues
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In this activity (on page 8), learners model how marble statues and buildings are affected by acid rain.