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    Perkins School for the Blind
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    This activity was designed for blind learners, but all types of learners can explore means of physically separating a mixture using dissolving, filtration, and evaporation. Separating a sand/salt...

    $1 - $5 per group Ages 11 - 18 10 to 30 minutes
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    Oregon Museum of Science and Industry
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    Learners build models to learn about the special cells and structures that plants use to move water from their roots up through the stems and leaves. The celery-in-colored-water demonstration...

    $5 - $10 per group Ages 8 - 11 1 to 7 days
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    American Chemical Society
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    In this activity, learners try to revive wilted celery. Learners discover that plants wilt when their cells lose water through evaporation. Use this activity to introduce capillary action.

    $1 - $5 per group Ages 4 - 11 4 to 24 hours
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    Lawrence Hall of Science
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    This warm weather activity introduces learners to the impact trees have on blocking the sun's heat and reducing temperature on the Earth's surface. Learners set containers with water in a...

    1 cent - $1 per student Ages 4 - 14 2 to 4 hours
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    WNET
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    In this fun hands-on activity, learners use simple materials to investigate evaporation. How can the evaporation of water on a hot day be used to cool an object? Find out the experimental way! The...

    $1 - $5 per group Ages 8 - 11 10 to 30 minutes
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    Kohl Children's Museum
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    In this activity, learners investigate and compare the rate of drying in different conditions. Learners place wet dish cloths in front of a fan, on a flat surface inside the room, in a box with a...

    $1 - $5 per group Ages 6 - 11 30 to 45 minutes
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    Bill Nye
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    In this activity, learners discover how sweating makes us feel cooler. Learners put on one damp sock and one dry sock and sit in front of a fan. As the water in the damp sock evaporates, it makes...

    free Ages 4 - 14 5 to 10 minutes
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    BBC
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    In this online activity, learners use reversible and irreversible changes to save the Crystal of St Helena from SKUL! Learners discover whether processes like freezing, sieving, and dissolving are...

    free Ages 8 - 14 5 to 10 minutes
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    Lawrence Hall of Science
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    In this outdoor activity, learners compare the moisture released from different kinds of leaves and from different parts of the same leaf, by observing the color change of cobalt chloride paper....

    $10 - $20 per group Ages 8 - 18 45 to 60 minutes
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    The Exploratorium
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    In this weather-related activity, learners make a portable cloud in a bottle. Learners discover that clouds form when invisible water vapor in the air is cooled enough to form tiny droplets of...

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

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