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    Lunar and Planetary Institute
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    In this activity, learners consider the water features they might enjoy at a community park--a pond, brook, water playground (or "sprayground"), or pool--and what happens to the water...

    Over $20 per group Ages 4 - 14 10 to 30 minutes
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    NOAA
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    In this activity, learners observe the hydrologic cycle in action as water evaporates and condenses to form rain right before their eyes. Learners perform a simple experiment to precipitate "...

    1 cent - $1 per group Ages 4 - 14 10 to 30 minutes
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    NOAA
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    In this activity, learners estimate how much water they think can be found in various locations on the Earth in all its states (solid, liquid, and gas) to discover the different water ratios in the...

    free Ages 6 - 14 10 to 30 minutes
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    NOAA
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    In this activity, learners explore the different salinities of various sources of water by taste-testing. Learners will taste water samples with the appropriate amount of salinity representing...

    $1 - $5 per group Ages 6 - 14 10 to 30 minutes
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    Astronomical Society of the Pacific
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    This fun and simple hands-on astronomy activity demonstrates the shadow of the Earth as it rises as a dark blue shadow above the eastern horizon. Shadows are not just what we see on the sidewalk,...

    $5 - $10 per group Ages 6 - adult 10 to 30 minutes
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    California Academy of Sciences
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    This creative lesson plan provides a visual way for learners to gain knowledge about the finite amount of fresh water on Earth and encourages the discussion of the various ways to conserve this...

    $1 - $5 per group Ages 6 - 14 10 to 30 minutes
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    The Exploratorium
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    In this activity, learners observe as soap bubbles float on a cushion of carbon dioxide gas. Learners blow bubbles into an aquarium filled with a slab of dry ice. Learners will be amazed as the...

    $1 - $5 per group Ages 6 - 14 10 to 30 minutes
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    COSI
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    In this physics activity (page 6 of the PDF), learners will demonstrate air has weight by comparing an inflated balloon to a deflated one. This activity was created as a pre-visit for a traveling...

    $1 - $5 per group Ages 4 - 11 10 to 30 minutes

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