4 plate tectonics Flashcards
what is the area where two plates meet called?
a fault
what are tectonic plates made from?
oceanic crust and continental crust
what are the 3 different interactions between plates?
convergent divergent transform
whats convergent?
plates move towards each other
whats divergent?
plates move away from each other
whats transform?
plates move past each other
when does convergent plate boundary occur?
when oceanic and continental plates move together
whats another occasion when convergent plate boundary occurs?
when two continental plates collide
when does divergent plate boundary occur
when plates move apart
dpb how are volcanoes formed
as magma moves up to fill the gap,
dpb how is new crust formed?
when magma solidifies and joins onto the existing plate
when does transform plate boundary occur
when plates slide past each other, san andreas fault
whats a frequent source of eathquakes
trabsform plate boundary
what causes the plates to move?
solid lithosphere changes to a semi solid asthenosphere which can flow(movement in the liquid mantle= tectonic plates mocement)
what is a mantle plume
superheated magma from near the core that rises upwards
