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    The Exploratorium
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    In this activity, learners use basic measurements of the Earth and pieces of rock and iron to estimate the mass of the Earth. Learners will calculate mass, volume, and density, convert units, and...

    free Ages 14 - 18 45 to 60 minutes
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    Smithsonian Center for Education and Museum Studies
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    In this online interactive, learners use fossils to infer temperatures 55 million years ago, at the sites where the fossils were found. Using their observation skills, learners examine fossils of...

    free Ages 11 - 18 10 to 30 minutes
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    Windows to the Universe
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    In this activity, learners investigate various appliances and electronics, discovering how much energy each uses and how much carbon dioxide (CO2) is released to produce that energy. Learners use a...

    Over $20 per group Ages 11 - 18 1 to 2 hours
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    PBS
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    In this math lesson, learners apply the concepts of ratio and proportion to the capture-recapture statistical procedure. Learners are given containers (the bay) and an unknown number of fish-shaped...

    $5 - $10 per group Ages 11 - 14 45 to 60 minutes
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    Howard Hughes Medical Institute
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    This guided inquiry three-part activity engages learners in thinking about the mechanism of natural selection through data collection and pattern recognition. In this scenario, learners use M&...

    $5 - $10 per group Ages 11 - 18 1 to 2 hours
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    NOAA
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    In this activity, learners will measure the length of a shadow and use the distance from the equator to calculate the circumference of the earth. Note: This experiment can only be done at solar...

    1 cent - $1 per group Ages 8 - 18 10 to 30 minutes
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    Twin Cities Public Television
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    This activity (located on page 3 of the PDF under GPS: Temperate Rain Forest Activity) is a full inquiry investigation into tree growth rates. Groups of learners will count tree rings to determine...

    $10 - $20 per group Ages 8 - 14 45 to 60 minutes
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    Bridge: Online Ocean Science Education Resource Center
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    In this data analysis and environmental science activity, learners evaluate the feasibility of wave energy as a practical alternative energy source using ocean observing system (OOS) buoys....

    free Ages 14 - adult 1 to 2 hours
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    NOAA
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    In this 6-7 day investigation, learners begin with an introduction to seamounts that are present in the Gulf of Alaska. They learn how seamounts were formed and look at a bathymetric map of a...

    $5 - $10 per group Ages 11 - 14 1 to 7 days
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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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