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Salt 'n Lighter
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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.
Weighty Questions
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In this activity about humans and space travel (page 1 of PDF), learners compare and contrast the behavior of a water-filled plastic bag, both outside and inside of a container of water.
Ships Ahoy!
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Design a vessel that tests the limits of wind power given a set of off the shelf and recycled materials.
Draggin' Boats
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Learners design, build, and test models of "dragon boats" made from up to three milk cartons.
Build a Raft
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In this activity, learners explore density and buoyancy as they design and construct rafts.
Ships Ahoy!
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The goal of this activity is to design the fastest sailboat or one that carries the most treasure.
Flinker
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In this activity, learners make a foam packing peanut "flink"--neither float away nor sink--in water. Learners experiment with materials to make a Flinker that "flinks" for 10 seconds.