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    Lunar and Planetary Institute
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    In this activity, learners model ancient lunar impacts using water balloons. By measuring the diameter of the crater area, learners discover that the Moon's largest impact basins were created...

    Over $20 per group Ages 8 - 14 10 to 30 minutes
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    NASA
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    In this activity (page 10 of PDF), learners approximate the area of the uppermost cross section of an impact crater using a variety of square grids. They conclude which angle of impact results in...

    $5 - $10 per student Ages 8 - 14 45 to 60 minutes
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    Lunar and Planetary Institute
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    In this activity, learners drop impactors onto layers of graham crackers! The process models how impacts throughout the Moon's history have broken rocks down into a mixture of dust, rocks, and...

    $5 - $10 per group Ages 8 - 14 10 to 30 minutes
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    University of Nebraska State Museum
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    In this activity (on pages 12-15), learners make a crater model and test the effects of weather (rain) on its surface. This activity helps learners understand how Earth's crust is constantly...

    $1 - $5 per group Ages 8 - 14 30 to 45 minutes
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    Lunar and Planetary Institute
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    In this activity, learners measure the diameter of their water balloons, model an impact, measure the diameter of the “crater” area, and determine the ratio of impactor to crater. This activity is...

    $1 - $5 per group Ages 8 - 14 10 to 30 minutes
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    Lunar and Planetary Institute
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    In this activity, pairs of learners model how scientists use craters to determine the ages of lunar surfaces. One partner keeps time while the other creates a painting for the other to interpret....

    $10 - $20 per group Ages 8 - 14 10 to 30 minutes
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    The Center for Science Education @ Space Sciences Laboratory, UC Berkeley
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    In this activity, learners investigate the formation of craters. Learners will examine how the size, angle and speed of a meteorite's impact affects the properties of craters. Learners will...

    $1 - $5 per student Ages 6 - 14 45 to 60 minutes
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    TERC
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    Based on color photographic images, learners compare geological features on Earth and Mars to understand similarities and differences between the two planets, and consider the forces that created...

    1 cent - $1 per group Ages 11 - 18 45 to 60 minutes
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    NASA
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    In this activity (page 18 of PDF), learners will measure the volume of impact craters created by projectiles of different masses. They will also draw connections between the mass of the projectile...

    $10 - $20 per student Ages 8 - 14 45 to 60 minutes
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    NASA
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    In this activity (page 23 of PDF), learners conduct an experiment to determine how the size and mass of a projectile affects the area and the volume of an impact crater. Learners will use formulas...

    $10 - $20 per group Ages 8 - 14 45 to 60 minutes

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