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    Centers for Ocean Sciences Education Excellence
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    This activity focuses on interactions within Earth systems and the effects of human activities. In this activity learners build a biomass pyramid. This game shows how factors affecting lower...

    1 cent - $1 per group Ages 8 - 14 45 to 60 minutes
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    Omaha's Henry Doorly Zoo
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    In this activity, learners can play two card games related to endangered species, specifically North American amphibians. In version one, "Guess My Amphibian," a learner secretly selects...

    1 cent - $1 Ages 6 - 11 5 to 10 minutes
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    American Association for the Advancement of Science
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    Learners discover that their breath contains carbon dioxide, one of the pollutants found in car exhaust. They blow bubbles into water, then use an indicator (bromothymol blue) to see that the water...

    1 cent - $1 per group Ages 8 - 11 5 to 10 minutes
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    4-H
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    In this indoor and/or outdoor activity, learners make an anemometer (an instrument to measure wind speed) out of a protractor, a ping pong ball and a length of thread or fishing line. This is a...

    1 cent - $1 per student Ages 8 - 14 10 to 30 minutes