Topic 1 Flashcards
earths interior is made up of what
crust, mantle, outer core, inner core
of crust, mantle ,outer core, and inner core which is liquid
outer core
How was the earth created
it weas heated from bombardment , gravitational compression, and radioactive decay
characteristics of continental crust
stiff and solid, 20-80km, rich in Si and Al, low density
characteristics of oceanic crust
stiff and solid, 5-10km, rich in Fe and Mg, higher density than continental crust
characteristics of the mantle
solid, the uppermost mantle is stiff
asthenosphere
part of the mantle SOLID but can flow
mesophere
part of the mantle, stiffer than asthenosphere but can still flow
lithosphere
uppermost mantle and crust, solid and stiff, moves during plate tectonics, DOES NOT INCLUDE athesnosphere
divergent boundary characteristics
plates move away from each other, mostly sea floor, as they move away they get older and colder
convergent boundary characteristics
plates move towards each other
Subduction characteristics
lower density plate goes above
ocean-ocean convergent boundary
higher density oceanic crust subducts beneath lower density oceanic crust
Continent -continent convergent boundary
produces VERY large mountains
Transform boundary
side to side movement , no crust created or destroyed
