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    The Exploratorium
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    Construct a simple battery that's able to power a small light or motor out of foil, salt water, and charcoal. A helpful video, produced by the Exploratorium, guides you along on this activity.

    $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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    Oregon Museum of Science and Industry
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    In this chemistry activity (on page 2 of the PDF), learners corrode a penny in a cup with vinegar, salt water, and a source of iron (nails, paper clips, or twist ties). The combination of salt and...

    1 cent - $1 per student Ages 6 - 14 1 to 7 days
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    American Chemical Society
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    Learners see that a carrot slice sinks in fresh water and floats in saltwater. Considering the placement of the carrot slice in water and saltwater, learners infer that the density of salt water...

    1 cent - $1 per group Ages 8 - 14 10 to 30 minutes
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    Oregon Museum of Science and Industry
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    In this activity, learners investigate the process of osmosis by adding salt to a sealed bag of raw carrots and comparing it to a control. After about 15-30 minutes, the carrots with salt become...

    $1 - $5 per group Ages 8 - 14 10 to 30 minutes
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    The Exploratorium
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    Build a hydrometer (measures the density of a liquid) using a pipet or eyedropper.

    1 cent - $1 per student Ages 8 - 18 5 to 10 minutes
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    The Exploratorium
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    Making liquids of different densities to perfectly lay on top of each other can be a frustrating exercise. The Exploratorium created this activity as a fool proof way of making a density column.

    1 cent - $1 per student Ages 6 - 18 5 to 10 minutes
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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, high voltage is applied across a pickle to emit a yellow glow. This activity should only be conducted by skilled adults and is best suited as a demonstration. Optional extensions...

    $5 - $10 per group Ages 8 - 14 10 to 30 minutes
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    American Chemical Society
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    In this activity, learners apply a dissolving test to known crystals to identify the unknown. Since the unknown is chemically the same as one of the known crystals, it should dissolve similarly. By...

    $1 - $5 per group Ages 8 - 14 10 to 30 minutes

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