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Gieant Sieve Sorter

The Exploratorium

This Exploratorium activity explores size and scale. Through four levels of screen sizes, learners can sort out objects of different sizes.

$1 - $5 per student Ages 6 - 14 5 to 10 minutes

Hot Stuff!: Testing for Carbon Dioxide from Our Own Breath

Integrated Teaching and Learning Program, College of Engineering, University of Colorado at Boulder

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Learners blow into balloons and collect their breath--carbon dioxide gas (CO2). They then blow the CO2 from the balloon into a solution of acid-base indicator.

$1 - $5 per student Ages 8 - 14 5 to 10 minutes