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This activity guide includes instructions on how to build a "Shake Table" by mounting an eccentric mass (off center) on the shaft of a small dc motor.

Over $20 per group Ages 11 - 18 45 to 60 minutes
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In this geology activity learners build a "squeeze box," which allows them to compress layers of sediment. This is a great way to investigate folding and faulting in the Earth.

$10 - $20 per group Ages 8 - 18 5 to 10 minutes