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In this activity on page 24, learners perform experiments to examine whether or not trash can float, blow around, or wash away.

1 cent - $1 per group Ages 6 - 14 30 to 45 minutes
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In this outdoor activity, learners simulate an oil spill using popcorn (both oil and popcorn float on water), and estimate the spill's impact on the environment.

$10 - $20 per group Ages 8 - 14 45 to 60 minutes
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This activity (on page 2 of the PDF SciGirls Activity: Milk Carton Boat) is a full inquiry investigation into boat hull design.

$10 - $20 per group Ages 8 - 14 4 to 24 hours