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The Ability of Permeability
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In this activity (page 11 of the PDF), learners investigate how quickly water moves through various materials. They measure and compare the permeability of gravel, sand, and soil.
Build a Battery
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Learners build a simple one-cell battery and use an ammeter to measure the flow of current.
Hot and Cold
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In this chemistry challenge, learners discover that many chemical reactions involve heat loss or gain.