Plate Tectonics Vocabulary

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plate
A large section of Earthe's oceanic or continental and rigid upper-mantle that moves around the Asthenosphere.
Lithosphere
Rigid layer of Earth about 100km thick made of the crust and a part of the upper-mantle.
Asthenosphere
Plastic-like layer of Earh on which the lithospheric plates float and move around.
divergent boundary
The boundary between two plates that are moving apart.
convergent boundary
The boundary between two plates that are moving together.
subduction zone
Area where an oceanic plate subducts, or goes down, into the mantle.
transform boundary
Where two plates slide past each other.
convection current
Current in Earth's mantle that transfers heat in Earth's interior and is the driving force for plate tectonics.
rift valley
Boundaries of plates.
strike-slip fault
Break in rock caused by shear forces, where rocks move past each other without much vertical movement.