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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 activity, learners investigate soil erosion. Learners set up a simulation to observe how water can change the land and move nutrients from one place to another.

$1 - $5 per student Ages 6 - 11 10 to 30 minutes