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    Oregon Museum of Science and Industry
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    In this activity, learners explore temperature changes from chemical reactions by mixing urea with water in one flask and mixing calcium chloride with water in another flask. They observe that the...

    $1 - $5 per group Ages 4 - adult Under 5 minutes
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    Oregon Museum of Science and Industry
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    In this activity, learners separate a mixture of pebbles, salt crystals, and wood pieces. They add water and pour the mixture through a strainer. The pebbles are left in the beaker, the wood is...

    $1 - $5 per group Ages 4 - adult Under 5 minutes
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    Mount Holyoke College
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    In this kitchen chemistry activity, learners explore the chemistry of crystals by making sugar crystals, consider a common chemical reaction type responsible for the rising of muffins and cake in...

    $5 - $10 per group Ages 8 - 14 1 to 7 days
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    Oregon Museum of Science and Industry
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    In this activity, learners create a mixture of water, alcohol and permanent marker ink, and then add salt to form a colored alcohol layer on top of a colorless water layer. The reason this happens...

    $1 - $5 per group Ages 11 - 14 45 to 60 minutes
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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 use it to investigate heterogeneous and homogeneous mixtures and solutions, identify the differences, and explore the...

    $1 - $5 per student Ages 11 - 18 10 to 30 minutes
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    The Exploratorium
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    This activity shows you how to make amazing crystal spikes using Epsom salt and the sun. When Epsom salt is dissolved in water and placed in a container in the sun, the water evaporates, leaving...

    $1 - $5 per student Ages 6 - 11 1 to 2 hours
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    The Exploratorium
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    In this activity, learners discover the primary physical properties used to separate pure substances from mixtures. Learners use test tubes, beakers, magnets, and other tools to separate a mixture...

    $1 - $5 per group Ages 8 - 18 1 to 7 days
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    The Exploratorium
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    In this activity, learners conduct an oxidation experiment that turns old pennies bright and shiny. Learners soak 20 dull, dirty pennies in a bowl of salt and vinegar for five minutes. They rinse...

    $1 - $5 per group Ages 8 - 14 1 to 2 hours
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    Smithsonian Center for Education and Museum Studies
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    In this activity (located on pages 9-14 of PDF), learners visit a cemetery to examine the distinguishing characteristics of rock weathering. After researching stone weathering and acid rain,...

    free Ages 8 - 14 1 to 7 days
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    Oregon Museum of Science and Industry
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    In this activity, learners discover that there is space between molecules even in a cup "full" of water. They first fill a cup with marbles, and then add sand to fill the gaps between the...

    $1 - $5 per group Ages 6 - 14 10 to 30 minutes

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