Plate Tectonics Flashcards
Continental drift
Continents suggested that continents are in constant motion on the surface of earth
Pangaea
A super continent with all the continents combined together
Alfred wegener
German scientist that proposed theory of continental drift and Pangaea
Seafloor spreading
Process that creates new oceanic trust that forms along a mid ocean ridge and oceanic crust move away from the ridge
Mid ocean ridge
Mountain ranges in the middle of the oceans
Plate tectonics
Earths surface is made of rigid slabs of rock or plates that move with respect to each other
Plates
Earths surface is broken up to pieces
Lithosphere
The cold and rigid outermost rock later
Asthenosphere
Hot silly putty like mantle
Plate boundary
Where plates interact and touch
Divergent plate boundary
Two plates seperate
Melt
Form volcanoes and earthquakes
Convergent plate boundary
O-C (ocean subducts)
C-C (no subduction)
O-O (older plate subducts
Rift valley
When crust is pulling apart and breaks apart(hole in between)
Subduction
Denser plate sinks below the more buoyant plate
Transform plate boundary
Forms where 2 plates slide past each other.
No subduction