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Vortex
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In this activity, learners create a tornado in a bottle to observe a spiraling, funnel-shaped vortex. A simple connector device allows water to drain from a 2-liter bottle into a second bottle.
Two-String Yo-Yo
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Learners build a yo-yo using a piece of wood, PVC pipe, and string. In doing so, learners explore the force of gravity and angular momentum.
Bouncing Yo-Yo
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In this activity, learners build unique yo-yos, which spin round and round without moving up and down.