Plate tectonics
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Mid-ocean ridge | In 1960 Harry Hess discovered huge cracks in the ocean crust
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| Sea floor spreading | Along the mid-ocean ridge magma rises through the crust hardened and creates new land
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| Plate tectonics | Explains the formation and movement of the Earth's plates
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| Plate boundaries | Where two plates meet
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| Transform boundaries | Two plates slip past each other in opposite directions
Causes faults, which breaks in Earth's crust
Earthquakes are common in these areas
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| Divergent boundaries | Two plates move apart
In the ocean this forms mid-ocean ridges -place where magma comes up through the ocean 's crust
On land Rift Valley's
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| Convergent boundaries | Two plates come together and collide
In the ocean this causes ocean trenches to form
On land mountains form
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