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The Earth's Timeline
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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).
Digging Into the Past
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This activity (on pages 23-27) lets learners simulate the work of scientists who take core samples of Earth's rocky layers to determine geological history.
Shape it Up
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In this online activity, learners see simulations of how processes shape the Earth, and see estimates of how long these processes take.