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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.

In this online activity, learners see simulations of how processes shape the Earth, and see estimates of how long these processes take.

In this activity, learners model hot spot island formation, orientation and progression with condiments.

In this activity, learners create volcanoes like those they have examined on Earth and Mars through images taken by spacecraft.