tectonic plates Flashcards
what is the crust?
the outermost layer of the earth
definition of mantle
layer of rock between the core and crust
definition of magma
liquid rock
why is magma liquid rock?
the heat from the earths core melted it
definition of core
dense hot rocks at the centre of the earth
As heat from the earths core rises it sets of…
convection currents in the mantle
what are the two types of crust
oceanic crust and continental crust
where are continental and oceanic crusts found?
oceanic crust- found under the sea. its thin but very dense
continental crust- found under the land. its thicker but less dense
definition of constructive plate margin
where plates are moving apart
definition of conservative plate margin
where plates slide past each other
definition of destructive plate margin
where plates collide
what is the pattern of earthquakes and volcanoes?
They are arranged along tectonic plate boundaries.
what are the 3 plate boundaries
convergent, divergent and transform
definition of earthquake
vibrations in the earths crust that create a shaking surface
