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    California Academy of Sciences
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    In this activity, learners will learn how igneous rock, metamorphic rock, and sedimentary rock are formed as part of the rock cycle and that the same forces that produce/change rocks also produce...

    free Ages 8 - 18 30 to 45 minutes
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    University of Nebraska State Museum
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    In this activity (on pages 16-21), learners get a sense of geological time by understanding how big a million is. Part One of the activity is the "Million Appreciation Lesson," which puts...

    $1 - $5 per group Ages 8 - 14 1 to 2 hours
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    The Exploratorium
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    In this activity, learners use crayons to draw conclusions about rocks and the rock cycle. Learners form crayons ((which can be "weathered"—heated, compressed and cooled—like rocks) into...

    $5 - $10 per group Ages 8 - 18 45 to 60 minutes
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    Lunar and Planetary Institute
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    In this activity, learners investigate the Moon's infancy and model how an ocean of molten rock (magma) helped shape the Moon that we see today. Learners create a simple model of this process...

    Over $20 per group Ages 8 - 14 10 to 30 minutes