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    Oregon Museum of Science and Industry
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    Learners explore how recyclers take advantage of the different properties of materials, such as magnetism and density, to separate them from a mixture. They use a magnet and floatation to separate...

    1 cent - $1 per group Ages 4 - 14 Under 5 minutes
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    Lawrence Hall of Science
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    In this activity, learners observe mixtures of sand samples glued to note cards, and consider how sand can differ in size, shape, and color, and where it comes from. The goal is to help learners...

    1 cent - $1 per group Ages 4 - adult 10 to 30 minutes

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