PLATE TECTONICS Flashcards
(10 cards)
Divergent
-2 plates move away from each other
-pull apart the ocean floor
- magma fills crack creating a ridge
(North America + Eurasian)
Convergent
When 2 plates move towards each other
Subduction
-continental and oceanic plate collide
-oceanic is sub ducted and recycled because it’s denser
-magma shoots up through crust
(Juan de fuca + North America)
Continental
-2 continental plates move toward each other
-layers of rock are forced up to create mountains
(Appalachian mountains)
Transform
-2 plates move in opposite directions parallel to each other
-when plates lock, tension builds
(San Andreas fault zone)
Divergent Effects
Volcanos
Subduction Effects
Volcanos, Earthquakes, tsunamis
Continental Effects
Earthquakes (sometimes)
Transform Effects
Earthquakes, tsunamis
Convection Currents
Mantle pieces moving in a temperature cycle
warm near core, cool near crust
-cause plates to move