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This activity demonstrates liquefaction, the process by which some soils lose their solidity during an earthquake.

1 cent - $1 per group Ages 8 - 18 10 to 30 minutes
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In this design-based lesson, learners study flood dynamics as they modify a riverbed with blockages or levees to simulate real-world scenarios.

Over $20 per group Ages 11 - 14 1 to 2 hours