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    The Exploratorium
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    In this hands-on and feet-on excursion, learners take a science walk to visualize the planet's immense size and numerous structures, without the usual scale and ratio dimensions found in most...

    1 cent - $1 per group Ages 11 - 18 45 to 60 minutes
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    Centers for Ocean Sciences Education Excellence
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    In this activity, learners explore density, convection, stratification, and, by inference, the melting of icebergs. Learners make hypotheses, test their hypotheses, and explain their observations.

    1 cent - $1 per group Ages 11 - 18 30 to 45 minutes
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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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    University of Alaska Fairbanks
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    In this activity related to climate change, learners examine albedo and the ice albedo feedback effect as it relates to snow, ice, and the likely results of reduced snow and ice cover on global...

    1 cent - $1 per group Ages 14 - 18 45 to 60 minutes
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    The University of Texas McDonald Observatory
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    In this activity, learners make an equatorial sundial, which is simple to construct and teaches fundamental astronomical concepts. Learners use the provided template and a straw to build the...

    1 cent - $1 per group Ages 11 - 18 2 to 4 hours
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    University of Washington
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    In this activity, learners use earthworms as "unknown creatures" from the South American jungle to find out how animals use senses. Learners are given supplies to devise their own...

    1 cent - $1 per student Ages 8 - 18 45 to 60 minutes
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    Bridge: Online Ocean Science Education Resource Center
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    Why is ocean water sometimes the warmest when the average daily air temperature starts to drop? In this activity, learners explore the differing heat capacities of water and air using real data....

    1 cent - $1 per student Ages 11 - 18 45 to 60 minutes
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    NOAA
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    In this activity and/or demonstration, learners illustrate visually and physically that air has weight. Learners balance two equally-inflated balloons hanging from string on a yard stick. Learners...

    1 cent - $1 per group Ages 8 - 18 5 to 10 minutes
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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