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In this activity, learners discover how geologists use stratigraphy, the study of layered rock, to understand the sequence of geological events.

$10 - $20 per group Ages 8 - 18 1 to 2 hours
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In this yummy earth science activity (page 5 of the PDF), learners use fudge to learn about different kinds of lava.

$5 - $10 per group Ages 11 - 18 30 to 45 minutes