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How do you measure a bubble when it's floating? You can't really, but in this activity, learners can measure the diameter of the ring of suds a bubble leaves on a flat surface.

1 cent - $1 per student Ages 4 - 14 10 to 30 minutes
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In this activity learners will measure and manipulate flubber using different tools. Learners will explore volume and make observations about texture and shapes.

$5 - $10 per group Ages 4 - 8 10 to 30 minutes
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This is an activity about turbidity, or the amount of sediment suspended in water.

$1 - $5 per student Ages 6 - 14 10 to 30 minutes
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In this activity, learners simulate what happens to a human spine in space by making Sponge Spool Spines (alternating sponge pieces and spools threaded on a pipe cleaner).

$5 - $10 per group Ages 8 - 14 10 to 30 minutes
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Yes, you can weigh your car by figuring out your wheel's tire pressure combined with the "tire's footprint." You'll need someone with a car, driver's license, and safety in mind.

free Ages 11 - adult 10 to 30 minutes
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Learners investigate signs of a chemical reaction when they mix vinegar and baking soda. In addition to a gas being produced, learners also notice the temperature decreases.

$1 - $5 per group Ages 6 - 14 10 to 30 minutes
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In this kinesthetic activity that demonstrates pressure, learners act as air molecules in a "container" as defined by a rope.

free Ages 8 - 14 10 to 30 minutes
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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.

$1 - $5 per group Ages 8 - 14 10 to 30 minutes
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In this experiment, learners use JOY liquid detergent and glycerin to make the largest bubble they can that lasts 15 seconds.

Over $20 per group Ages 4 - adult 10 to 30 minutes
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This activity was designed for blind learners, but all types of learners can participate to learn about conservation of gas. This is one of the classic experiments using baking soda and vinegar.

$1 - $5 per student Ages 8 - 14 10 to 30 minutes
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Learners smell balloons filled with different scents to guess what's inside. From this, they infer the presence and motion of scented molecules.

$5 - $10 per group Ages 4 - 14 10 to 30 minutes
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In this activity, learners estimate how much water they think can be found in various locations on the Earth in all its states (solid, liquid, and gas) to discover the different water ratios in the Ea

free Ages 6 - 14 10 to 30 minutes