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In this activity (on page 2 of the PDF under GPS: Sailboat Design Activity), learners will discover how the shape of an object, not just its weight, determines whether it floats or sinks.

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

Using simple, inexpensive items, learners build and test submarine models.

This activity (on page 2 of the PDF SciGirls Activity: Milk Carton Boat) is a full inquiry investigation into boat hull design.

The goal of this activity is to design the fastest sailboat or one that carries the most treasure.