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    Integrated Teaching and Learning Program, College of Engineering, University of Colorado at Boulder
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    In this demonstration, learners observe vinegar and baking soda reacting to form carbon dioxide (CO2) gas. The CO2 gas is trapped in a balloon, then blown through a straw into water with an acid...

    1 cent - $1 per group Ages 8 - 14 5 to 10 minutes
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    Integrated Teaching and Learning Program, College of Engineering, University of Colorado at Boulder
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    In a class demonstration, learners observe a simple water cycle model to better understand its role in pollutant transport. When polluted water evaporates, the pollutants remain behind, becoming...

    $5 - $10 per group Ages 8 - 14 30 to 45 minutes
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    Integrated Teaching and Learning Program, College of Engineering, University of Colorado at Boulder
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    Learners test two jars, one containing plain air and one containing carbon dioxide gas, to see their reactions to temperature changes. After being left in the sun for a period of time, learners...

    1 cent - $1 per group Ages 8 - 14 10 to 30 minutes
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    Integrated Teaching and Learning Program, College of Engineering, University of Colorado at Boulder
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    Learners play the role of materials engineers as they test the flexibility of different materials. They determine the strength-to-weight ratio of bars of these materials (e.g., steel, aluminum,...

    $5 - $10 per group Ages 11 - 14 45 to 60 minutes
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    Integrated Teaching and Learning Program, College of Engineering, University of Colorado at Boulder
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    Learners color and cut out a spiral-shaped snake. When they hang their snake over a radiator, the snake spins. This is because the heated air is less dense and rises, pushing against the snake and...

    free Ages 8 - 14 10 to 30 minutes
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    Integrated Teaching and Learning Program, College of Engineering, University of Colorado at Boulder
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    Learners observe a simple balloon model of an electrostatic precipitator. These devices are used for pollutant recovery in cleaning industrial air pollution. Combine this activity with other...

    $1 - $5 per group Ages 8 - 14 10 to 30 minutes
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    Integrated Teaching and Learning Program, College of Engineering, University of Colorado at Boulder
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    Learners conduct a simple experiment to model and explore the harmful effects of acid rain (vinegar) on living (green leaf and eggshell) and non-living (paper clip) objects. Learners observe the...

    $1 - $5 per group Ages 8 - 14 4 to 24 hours
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    Integrated Teaching and Learning Program, College of Engineering, University of Colorado at Boulder
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    Learners build a simple hovercraft using air from a balloon to levitate a craft made from a compact disc (CD). They learn that a bed of air under an object significantly reduces the friction as it...

    1 cent - $1 per student Ages 11 - 18 30 to 45 minutes
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    Integrated Teaching and Learning Program, College of Engineering, University of Colorado at Boulder
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    Learners use red cabbage juice and pH indicator paper to test the acidity and basicity of household materials. The activity links this concept of acids and bases to acid rain and other pollutants....

    $1 - $5 per group Ages 8 - 14 45 to 60 minutes
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    Integrated Teaching and Learning Program, College of Engineering, University of Colorado at Boulder
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    Learners see convection currents in action in this highly visual demonstration. Sealed bags of colored hot or cold water are immersed in tanks of water. When the bags are punctured with pinholes,...

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

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