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    Lawrence Hall of Science
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    In this highly physical outdoor activity, learners construct and compare experimental trail sections to select the best trail-construction technique for their site. As they measure, evaluate and...

    Over $20 per group Ages 8 - 18 1 to 2 hours
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    Oregon Museum of Science and Industry
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    In this activity, learners explore acids and bases by preparing six solutions that combine vinegar and ammonia, ranging from acid (all vinegar) to base (all ammonia). They add an indicator to each...

    $5 - $10 per group Ages 8 - adult Under 5 minutes
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    The Science House
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    In this chemistry demonstration, learners will discover that phenolphthalein is a chemical that displays different colors depending on the acidity or basicity of the environment. Learners will be...

    $5 - $10 per group Ages 6 - 18 Under 5 minutes
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    Mensa Education & Research Foundation
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    In this activity on page 3 of the PDF, learners discover how science and Halloween are fun companions as they make paper bleed. Learners use an ammonia solution to make a "bloody"...

    $10 - $20 per group Ages 6 - 14 5 to 10 minutes
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    Oregon Museum of Science and Industry
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    Using household materials, learners can make white gooey globs from clear solutions. Alum, dissolved in water, reacts with the hydroxide in ammonia to create aluminum hydroxide. This creates a soft...

    1 cent - $1 per student Ages 8 - 14 5 to 10 minutes
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    Lunar and Planetary Institute
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    In this activity, learners observe the water cycle in action! Water vapor in a tumbler condenses on chilled aluminum foil — producing the liquid form of water familiar to us as rain and dew....

    1 cent - $1 per group Ages 8 - 14 10 to 30 minutes
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    Astronomical Society of the Pacific
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    In this activity (on page 5 of PDF), learners use dry ice and household materials to make scientifically accurate models of comets. Learners will investigate the ingredients in comets and how...

    $5 - $10 per group Ages 6 - adult 10 to 30 minutes
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    COSI
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    In this activity, which requires adult supervision, learners get to explore the awesome power of chemistry. They will choose from one of two types of crystals they want to grow and see first-hand...

    $1 - $5 per student Ages 8 - 18 10 to 30 minutes
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    Oregon Museum of Science and Industry
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    In this simple activity (on page 2 of the PDF), learners make a crystal garden using salt, water, and a brick. This is a take-home version of the display Crystal Garden in the Nature of Matter unit...

    $1 - $5 per student Ages 6 - 14 1 to 7 days
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    COSI
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    In this fun chemistry activity (page 3 of the pdf), learners use cabbage juice to determine the pH of several substances. Designed as a pre- or post-visit lesson in connection to a trip to COSI...

    $1 - $5 per group Ages 8 - 11 30 to 45 minutes

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