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Catapult
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Build a catapult that transforms the potential energy of a twisted rubber band into kinetic energy. Experiment with design variations so that you can hit a target with a projectile.
The Thousand-Yard Model
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This is a classic exercise for visualizing the scale of the Solar System.
Building a 3-D Space Maze: Escher Staircase
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In this activity (page 95 of the PDF), learners create Escher Staircase models similar to those that were used by Neurolab's Spatial Orientation Team to investigate the processing of information about
Build A Hydrometer
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In this activity, learners will explore how a hydrometer works by building a working model and conducting experiments.