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The earth's crust is made up of 7 large plates that are constantly moving and interacting, which can cause mountains to form, earthquakes, volcanoes and tsunamis. When plates collide they can push the earth's crust up to form mountain ranges like the Himalayas. Earthquakes happen when plates scrape against each other. Volcanoes are formed in gaps in plates where magma rises up. Tsunamis are generated by large shifts of plates under the ocean.





