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Pneumatic Trough
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In this activity, learners build a "pneumatic trough," a laboratory apparatus used for collecting pure gas samples over water.
Stiff Bones, Bendy Bones
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Bones are stiff, which helps us lift heavy things and walk around, but they are also somewhat flexible, which lets them bend slightly.
The World's Water
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Water on Earth is in lakes, the ocean, rivers, underground, and frozen glaciers.