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Shrinking Cups
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This is a quick activity (on page 2 of the PDF under Gecko Feet Activity) about the forces of gravity and surface tension and how their behavior is influenced by size.
Blowin' in the Wind
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In this environmental engineering activity, learners build windmills using everyday items. The first challenge is to build windmills that spin when placed in front of a fan.
No-Slip Grip
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In this physical sciences activity, learners explore friction. Learners investigate the factors that affect the force required to move an object.