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Click & LearnThis interactive tool allows students and educators to build models that explain how the Earth system works and how it is affected by human activities and nonhuman phenomena.
Click & LearnDownload the accompanying student worksheet under "Downloads." What did Earth look like 250 million years ago? Or 1 billion years ago? Or 4.5 billion years ago? EarthViewer is an interactive tool that allows you to explore the science of Earth's deep history.
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