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    Oregon Museum of Science and Industry
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    Learners use a candle to investigate the products of combustion. When a glass rod is held over a lit candle, the candle flame deposits carbon on the rod. Then the candle and a drop of pH indicator...

    1 cent - $1 per group Ages 11 - adult 5 to 10 minutes
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    Oregon Museum of Science and Industry
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    Learners add acid rain (nitric acid) to two cups that represent lakes. One cup contains limestone gravel and the other contains granite gravel. Learners also add an indicator to each solution that...

    1 cent - $1 per group Ages 14 - adult 5 to 10 minutes
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    Oregon Museum of Science and Industry
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    Learners gain an intuitive knowledge of the physical aspects of watersheds by creating their own watershed models. They crumple up pieces of paper into model mountain ranges, and then use water...

    1 cent - $1 per group Ages 8 - 11 45 to 60 minutes