Plate

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Plate

• Tectonics

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The lithosphere is broken

• into sections called plates.

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The plates fit closely together along cracks
in the lithosphere.
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The theories of Continental Drift and Sea-Floor
Spreading were combined to one theory- Plate
Tectonics.
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The theory of Plate Tectonics explains the
formation, movement, and subduction of Earths
plates.
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Convection currents in the mantle cause the
movement of the plates.
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As the plates move, they collide, pull apart, or
grind past each other, causing volcanoes,
mountain ranges, and deep-sea trenches.
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Faults are breaks in the Earths crust, where
rocks have slipped past each other, and form
along boundaries.
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A transform boundary is a plate where two plates
slip past each other, moving in opposite
directions.
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A divergent boundary is where two plates move
apart, or separate.They can cause mid-ocean
ridges and rift valleys.
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A convergent boundary is where two plates collide
or come together. The more dense plate is on top
and the least dense plate on the bottom.
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Convergence of plate boundaries cause subduction,
where the ocean floor sinks beneath a trench and
back into the mantle.
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