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Plate Tectonics
The Earth’s Crust in Motion…
Earth’s Puzzle

What plate do we live on? What plates do we border?
Locating Plate Boundaries
Types of Boundaries
 Divergent
 Convergent
 Transform
A
Divergent
•plates are
moving apart
•new crust is
created
•Magma is
coming to the
surface
B
Convergent
•plates are coming
together
•crust is returning
to the mantle
C
Transform
•plates are
slipping past
each other
•crust is not
created or
destroyed
A
Divergent
Continental crust
 rift valley
B
Convergent
2 continental plates 
mountain range
C
Transform
Plates move
against each
other
Stress builds up
Oceanic crust  midocean ridge
2 oceanic plates or
oceanic + continental
subduction
Stress is released
earthquake
A
Divergent
B
Convergent
C
Transform
Features –
Features –
Features –
Rift Valleys
Mid-ocean ridges
Mountain ranges (C-C)
Trenches (O-O and O-C)
Island Arcs (O-O)
Volcanoes (O-O & O-C)
Faults
Earthquakes
The Big Picture
Key Terms
convergent boundary
divergent boundary
transform boundary
Subduction
Subduction zone
rift valley
trench
mid-ocean ridge
continental crust
oceanic crust
mountain range
Earthquake
Benioff zone