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Visitors mix urea with water in one flask and mix calcium chloride with water in another flask. They observe that the urea flask gets cold and the calcium chloride flask gets hot.

$1 - $5 per group Ages 6 - adult Under 5 minutes
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In this activity, learners build a miniature wind tunnel to measure force. Learners construct the model out of Lexan plastic, a fan, and a precise digital scale.

Over $20 per group Ages 11 - adult 2 to 4 hours
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Visitors mix water and sodium bicarbonate (baking soda) in a large flask. They then add citric acid to the mixture and stopper the flask. The resulting reaction creates carbon dioxide gas.

$1 - $5 per group Ages 6 - adult Under 5 minutes
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Visitors separate a mixture of pebbles, salt crystals, and wood shavings by adding water and pouring the mixture through a strainer.

$1 - $5 per group Ages 6 - adult Under 5 minutes
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This board game teaches learners about energy decision making. Players select cards that determine the transportation and home design that will influence their expenses as they play.

$1 - $5 per group Ages 11 - 18 45 to 60 minutes
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In this experiment related to plant biotechnology, learners discover how to prepare and load an electrophoresis gel.

Over $20 per group Ages 11 - adult 1 to 2 hours
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Visitors use heat to shrink samples of polystyrene. They compare samples from containers that were shaped in different ways during manufacturing.

$1 - $5 per group Ages 6 - adult Under 5 minutes
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In this activity, learners use a laser pointer to project a microscopic image of a liquid sample suspended from the tip of a syringe.

Over $20 per group Ages 14 - adult 30 to 45 minutes
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Visitors incrementally increase the amount of iodate in three different test tubes containing the same amount of a starch solution.

$1 - $5 per group Ages 6 - adult Under 5 minutes
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In this outdoor activity, learners race small boats, made of cork, balsa wood, popsicle sticks etc., to investigate the rate and direction of currents in a stream or creek.

$10 - $20 per group Ages 8 - 18 45 to 60 minutes
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Learners write their initials by applying different clear "magic ink" solutions to separate pieces of paper and then "develop" the inks with other clear solutions.

$1 - $5 per group Ages 14 - adult Under 5 minutes
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Learners use Benedict’s solution and heat to test for the presence of simple sugars in glucose, sucrose, starch, and starch combined with amylase.

$5 - $10 per group Ages 11 - adult 10 to 30 minutes
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Learners experiment with a piece of Silly Putty® by stretching, bouncing, and snapping it. They then create flubber, a similar substance, by mixing diluted glue and a solution of sodium borate.

$1 - $5 per group Ages 6 - adult Under 5 minutes
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In this activity, learners electrically plate zinc onto brass objects.

1 cent - $1 per group Ages 11 - adult Under 5 minutes