Plate Tectonics
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PRESENTATION OUTLINE
Plate tectonics:
The theory that pieces of earths lithosphere are in constant motion, driven by convection currents in the mantle.
Photo by WorldIslandInfo.com
Convection currents:
The movement of a fluid caused by differences in temperatures that transfers heat from one part of a fluid to another.
Photo by Mark Morgan Trinidad B
Slab pull:
the portion of motion of a tectonic plate that can be accounted for by its subduction.
Photo by jenny downing
Ridge push:
sliding plate force is a proposed mechanism for plate motion in plate tectonics.
Photo by VinothChandar
Divergent plate boundary:
A plate boundary where two plates move away from each other.
On land divergent plate boundaries form Under water.
Photo by Art Poskanzer
Convergent plate boundary:
Tectonics plates or fragments of the lithosphere move toward one another and collide.
Photo by pmlbird
Convergent plate boundaries: two continental plates collide forming a mountain range.
Photo by Meg Stewart
When ocean and continental crust converge they form a mountain range. For example Himalaya mountains.
Photo by alextorrenegra
When ocean and ocean crust converge they form volcanoes. Example: volcanoes on Hawaii
Subduction zone: the process by which oceanic crust sinks beneath a deep ocean trench and back into the mantle at a convergent plate boundary. K
Photo by fung.leo
Deep ocean trench: a deep ocean valley that runs along the ocean floor. An example is the Peru-Chile trench
Photo by Mary Fairchild/Mfairlady
Transform boundary: when two plates slide past each other.
When plates move along transform boundaries it causes earthquakes.
Photo by martinluff
