Plate tectonicas Flashcards
Crust
The outermost shell of a rocky planet.
Mantle
Layer of molten rock between the crust and core.
Core
made up of mostly Iron. separated int the outer core (molten) and inner core ( solid).
Tectonic plate
the layer of rock that makes up the outer part of the earth, including crust and upper mantle (lithospheric plates)
Continental drift theory
The theory that continents gradually drifted overtime to their present positions
Asthenospere
A thin layer of earth,about 150 miles thick, at the border between the mantle and the crust.
Contravention
the process in which the hottest part of gas or liquid rise to the top and the cooler , dense parts sink.
convergent Boundary
when two tectonic plates come together.
Mountains
uplift of crustal plates that form elevated landmass.
Volcano
a vent fissure in earth’s surface through which magma and gases are expelled
Divergent bounduary
when a tectonic plates split apart.
transform bounduary
when tectonic plates slide past each other.
fault
breaks in the crust the movement causes seismic waves which produces earthquakes.
mid-ocean-ridge
a long ridge of underwater volcano between two diverging oceanic plates.
subduction zone
a place where one tectonic plate slides under another and melts also forms trench
