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In this geology activity (page 3 of the PDF), learners simulate an earthquake with little more than an elastic band and drinking straws.

$1 - $5 per student Ages 14 - 18 10 to 30 minutes
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This activity models the way Landsat satellites use a thermal infrared sensor to measure land surface temperatures.

Over $20 per group Ages 4 - adult 5 to 10 minutes