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    Lawrence Hall of Science
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    Many people get water from a source deep underground, called groundwater. In this activity learners will make a model to explore this hidden water, and see how it connects to the other bodies of...

    $10 - $20 per group Ages 6 - adult 10 to 30 minutes
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    American Chemical Society
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    In this activity, learners investigate soil erosion. Learners set up a simulation to observe how water can change the land and move nutrients from one place to another. After the activity, learners...

    $1 - $5 per student Ages 6 - 11 10 to 30 minutes
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    Lawrence Hall of Science
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    Glare from the sun and ripples from the wind can make it hard to see what's below the surface of a body of water. In this outdoor activity, learners will make their own viewscope to look...

    $5 - $10 per group Ages 6 - adult 10 to 30 minutes
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    Lawrence Hall of Science
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    Where rainwater goes after the rain stops? And why there are rivers and lakes in some parts of the land but not in others? In this activity, learners will make a model landscape using a plastic bin...

    $10 - $20 per group Ages 6 - adult 10 to 30 minutes
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    Lawrence Hall of Science
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    In this activity, learners explore a bucket of sand and beach objects. First they sort items using observable characteristics, then they turn hard candy into "candy sand" to model where...

    $1 - $5 per group Ages 4 - adult 10 to 30 minutes
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    NASA
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    In this outdoor activity, learners explore UV rays from the Sun and ways to protect against these potentially harmful rays. Learners use "detectors" (UV beads) at five different stations,...

    $10 - $20 per group Ages 4 - 18 10 to 30 minutes
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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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    Lawrence Hall of Science
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    This is a guide for facilitating interaction at a touch tank with marine animals. The instructions are for setting up a display in an informal science center, but could work anywhere. Both...

    $1 - $5 per group Ages 4 - adult 10 to 30 minutes
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    Lawrence Hall of Science
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    In this simulation activity, learners observe what can happen when ocean waves churn up water and oil from an oil spill. Learners fill a large bottle with water, blue coloring and hair conditioner ...

    1 cent - $1 per group Ages 6 - 14 10 to 30 minutes
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    Lawrence Hall of Science
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    In this activity, learners observe mixtures of sand samples glued to note cards, and consider how sand can differ in size, shape, and color, and where it comes from. The goal is to help learners...

    1 cent - $1 per group Ages 4 - adult 10 to 30 minutes

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