The earth's crust is separated into enormous plates that are constantly moving. All of our continents and oceans ride on these thick plates as they crash together, move apart or slide by each other.  The area where the plates meet is called a fault line. Because the earth is constantly expanding, the currents of molten rock underneath the plates build up pressure which is released through slight shifts. Move your cursor over the plates to see how they move.
| DID YOU KNOW? The earth's crust is made up of over a dozen large and small tectonic plates. They move between one and eight inches a year.
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