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In this activity, learners discover that as the salinity of water increases, the density increases as well. Learners prove this by attempting to float fresh eggs in saltwater and freshwater.

1 cent - $1 per group Ages 6 - 14 5 to 10 minutes
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Based of the The Tech Challenge 2015, learners will engage in two mini-design challenges related to seismic engineering.

$1 - $5 per student Ages 8 - adult 30 to 45 minutes