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    Twin Cities Public Television
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    In this quick activity (page 1 of the PDF), learners will build a simple Cartesian Diver in an empty 2-liter bottle. Use this activity to demonstrate the principle of buoyancy, similar to the...

    1 cent - $1 per group Ages 8 - 14 10 to 30 minutes
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    Twin Cities Public Television
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    In this activity (page 1 of the PDF), learners will visit a zoo, aquarium, or pet store to view a variety of fish. Learners sketch the different body types as well as observe where each fish spends...

    1 cent - $1 per student Ages 8 - 14 45 to 60 minutes

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