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    Oregon Museum of Science and Industry
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    In this activity, learners will model the mechanical weathering and erosion of rocks in a stream or river. Learners put "stones" made of plaster of paris into a plastic container filled...

    $1 - $5 per group Ages 8 - 11 10 to 30 minutes
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    Children's Museum Of Houston
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    Over 1 or 2 days, learners use vinegar to remove the calcium from a chicken bone. They then explore how the bones have changed. An accompanying video with Mr. O further explores the relationship...

    $1 - $5 per student Ages 8 - 11 10 to 30 minutes
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    The Exploratorium
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    In this activity, learners will explore globes of frozen water to learn how to ask and then answer 'investigable' questions. The activity includes four short online videos: Introduction,...

    $1 - $5 per group Ages 8 - adult 45 to 60 minutes