Geosphere Plate Tectonics @ NASA's Observatorium Earth's continental landmasses, upon which we live, may be thought of as ships drifting upon a sea, propelled wherever the currents take them. This slow voyage of the continents has reshaped the face of the Earth throughout its history. For Grades: 5-12 Continental Drift and Plate Tectonics @ NASA's For Kids Only Website Have you ever noticed how South America and Africa seem to fit together? If you have, you aren't alone. For Grades: 3-8 Volcanoes — So Hot, They're cool! In this meteorology and volcanology activity, the learner will be looking for the effect of eruptions on global temperature to see if there is a pattern. For Grades: 5-8

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