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    Twin Cities Public Television
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    This activity (located on page 3 of the PDF) is a full inquiry investigation into mapping the underground “plumbing” of geysers. Groups of learners will mimic an actual investigation into the...

    1 cent - $1 per group Ages 8 - 14 1 to 2 hours
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    Twin Cities Public Television
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    This is an activity (located on page 3 of the PDF) about the use of reduction agents to decontaminate ground water. Learners will conduct a reduction-oxidation (redox) reaction in which vitamin C...

    $10 - $20 per group Ages 8 - 14 2 to 4 hours

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