Geo Unit 2 Beginning Exam Review
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10 Terms
What forms at a divergent boundary?
Mid-ocean ridges, rift valleys, new crust, shallow earthquakes.
What is the key idea of a divergent boundary?
New crust is created as plates move apart.
What forms at a convergent boundary?
Mountains, volcanoes, deep ocean trenches, strong earthquakes.
What is the key idea of a convergent boundary?
Crust is destroyed or pushed upward when plates collide.
What happens at a transform boundary?
Earthquakes occur as plates slide past each other.
What is the key idea of a transform boundary?
No crust is created or destroyed—only earthquakes happen.
What is subduction?
A denser oceanic plate sinks under another plate into the mantle.
What is obduction?
Oceanic crust is pushed ONTO continental crust instead of sinking.
Did J. Tuzo Wilson discover tectonic plates?
No, he helped develop and explain plate tectonics.
What did Wilson contribute?
Transform faults, plate tectonics theory development, and the Wilson Cycle.