Earths interior
layer that has the most mass?
The mantle
what does the theory of plate tectonics state?
lithosphere broken into tectonic plates that are in constant slow motion
define convection
the transfer of heat through a fluid
define mid ocean ridge?
longest mountain range on earth found in earths oceans
name a famous transform boudarie?
San Andrea fault
how are inner and outter core alike?
both made out of iron and nikel
what determines weather tectonic plates will sink or not when it collides with another tectonic plate?
the densities of 2 tectonic plates
where does convection occur inside earth?
the asthenisphere
what kind of process happens at mid ocean ridges?
SEA-FLOOR-SPREADING
what kind of boundary exist at mid ocean ridges?
DIVERGENT
how are inner and outer core different?
inner core is a solid and outer core is a liquid
where do most volcano, faults, and earthquakes occur?
plate boundaries
what is the source of convection currents?
the inner core
what landform does subduction occur?
Deep ocean trenches
what boundary exist at subduction?
CONVERGENT
during sea floor spreading where is magma rising from?
it rises from the mantle
what is the ring of fire?
and area around the pacific plate with active volcanoes and frequent earthquakes
what causes earths lithospheres plates to move?
convection currents in the asthenesphere.
define sea floor spreading?
molten material rises along the mid ocean ridge, hardens and forms new ocean floor.
why is inner core a solid?
from all the pressure above from the layers?
what is the difference between contiental and oceanic crst?
continental crust is made of granite, less dense and oceanic crust is made of basalt and more dense.
what is hapening to the size of the pacific ocean
shrieking because, more subduction at DOT than there is at sea floor spreading.
what is the thickest layer?
the mantle
if new ocean crust is being added during this process why isn't earth getting larger?
old crust is subducted at Deep Ocean Trench
what is the thinest layer?
The crust