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Ocean acidification is a problem that humans will have to deal with as we release more and more carbon dioxide into the atmosphere.

$1 - $5 per student Ages 8 - 18 5 to 10 minutes
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Learners observe two joined glass tubes containing a conductive salt solution. Electrodes are passing an electric current through the water.

$10 - $20 per group Ages 11 - adult Under 5 minutes