tectonic plates
what is pangea
a super continent many years ago that had all the continens inside of it
what is subduction
subduction is when one tectonic plate is forced under another one
what is a divergent plate boundary
its when the tectonic plates are moving away from each other
what causes the mid oceon ridge
tektonic plates moving under eachother
how does slab pull effect the tectonic plate
it causes it to lower because the plate is dense and get pulled down
what is a tranform plate boundary
when the plates slide across eachother
what cause continental drift
the tectonic plates moving
is the oceon getting bigger because sea floor spreading, explain
no its not getting bigger because while new crust is formed their are subduction zones that get rid of old crust
is reversed polarity the opposite of normal polarity
yes
what is the lithosphere
the lithosphere is the crust and the upper layer of the mantle
what is ridge push
ridge push is when at the sea floor tectonic plates are pushed away from eachother and material rises to fill the gap
what is normal polarity
its when the magnetic north pole is near the actual north pole
what causes plate tectonics to move
the heat from the earths mantle pushing them around
what are convection curents
convection currents is the cycle where heat caucus materials to rise cool than fall back down
100s to millions of thousand of years