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PLATE BOUNDARIES
THE PLATES OF THE EARTH
• The Earth’s crust is made up of plates.
• The plates move in specific directions.
• The three directions that the plates move are labeled in relation to their boundaries.
Convergent Boundary
Plates move toward each other.
CONTINENTAL – CONTINENTAL CONVERGENT BOUNDARY
Mountains and volcanoes form
OCEANIC – OCEANIC CONVERGENT BOUNDARY
Ocean trenches form and sometimes underwater volcanoes and islands
OCEANIC – CONTINENTAL CONVERGENT BOUNDARY
Volcanoes form on the continental crust
SUBDUCTION ZONE
• This is when one tectonic plate sinks beneath the other. Usually the weaker plate sinks.
Divergent Boundary
The plates move away from each other.
OCEANIC – OCEANIC DIVERGENT BOUNDARY
Mid Ocean Ridge Forms
CONTINENTAL – CONTINENTAL DIVERGENT BOUNDARY
Transform Boundary
The plates slip past each other.
CONTINENTAL – CONTINENTAL TRANSFORM BOUNDARY
Earthquakes occur
OCEANIC – OCEANIC TRANSFORM BOUNDARY
Earthquakes and possible tsunamis