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    University of Nebraska State Museum
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    In this activity (on pages 18-28), learners explore how the shape of seeds affects how they are dispersed by wind, birds, ocean currents and other means. Learners make predictions about seeds'...

    $5 - $10 per group Ages 8 - 14 1 to 2 hours
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    The Exploratorium
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    In this geology activity, learners create a model using a mixture of salt and sand inside a CD case. When the case is tilted or inverted, the mixture dramatically sorts into a layered pattern. With...

    $5 - $10 per group Ages 11 - 18 1 to 2 hours
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    The Exploratorium
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    In this seismic simulation, learners play a "who-dunnit" game to explore earthquakes. Learners act as the source, carriers, and detectors of earthquake waves, while the group determines...

    free Ages 11 - adult 1 to 2 hours
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    Minnesota Zoo
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    In this activity, learners simulate a wolf and its habitat and observe what happens when the limiting factors change over time. This activity is designed for large groups of learners, but would...

    1 cent - $1 per group Ages 8 - 14 1 to 2 hours
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    The University of Texas McDonald Observatory
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    In this two-part activity, learners explore the Earth and Sun's positions in relation to the constellations of the ecliptic with a small model. Then they extend to explore the motions of the...

    1 cent - $1 per group Ages 4 - 18 1 to 2 hours
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    The University of Texas McDonald Observatory
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    In this three part activity, learners explore and experiment with shadows to learn about the Sun's relative motion in the sky. Learners will trace, measure and compare their shadows over time,...

    1 cent - $1 per group Ages 4 - 11 1 to 2 hours
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    Minnesota Zoo
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    In this activity, learners will simulate the interactions between a predator population of gray wolves and a prey population of deer in a forest. After collecting the data, the learners plot the...

    1 cent - $1 per group Ages 8 - 14 1 to 2 hours
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    Integrated Teaching and Learning Program, College of Engineering, University of Colorado at Boulder
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    This hands-on experiment will provide learners with an understanding of the issues that surround environmental cleanup. Learners will create their own oil spill, try different methods for cleaning...

    $1 - $5 per group Ages 8 - 14 1 to 2 hours
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    National Health Museum
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    In this simulation, learners become birds different beak types. Learners use various tools to represent beaks to pick up seeds and place them in a petri dish. After completing the activity and...

    $5 - $10 per group Ages 14 - 18 1 to 2 hours
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    National Health Museum
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    This is an outdoor activity designed to demonstrate evolution of feeding behavior in flocking, schooling or herding animals that maximizes allocation of food resources and enhances survival....

    $5 - $10 per group Ages 14 - 18 1 to 2 hours

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