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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 group activity, learners will mark important developments of life on Earth on a timeline (each foot in length representing 200 million years).

1 cent - $1 per group Ages 11 - adult 45 to 60 minutes
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In this activity, learners model hot spot island formation, orientation and progression with condiments.

$1 - $5 per student Ages 8 - 18 5 to 10 minutes