Vocab
Scientist who studies what the earth is made of
geologist
travels in a singular plane
p-wave
convection currents in the mantle and movement of tectonic plates
primary mechanism driving sea-floor spreading
heat from the earths core causes convection currents in the mantle
tectonic plates move
evidence supporting continental drift
fossils across continents
zippler-like chains of undersea mountains
mid-ocean ridge
travels up down left and right
s-wave
rising below the earths crust and creating new oceanic crust
magma
deep ocean trenches and volcanic mountain ranges
convergent boundary
analyzing speed and path through different layers
seismograph
Sinking movement of ocean floor back into the mantle
subduction
travels in a circular motion
surface wave
expansion of the ocean floor
sea floor spreading
plates slide past each other without creating or destroying
transform boundaries
super continent from 335 million years ago
pangea
plates slide past each other
transform boundary
bending of seismic waves
refraction
undersea valley that are the deepest part of the ocean
ocean trench
outermost layer of earth
crust
convection currents in the mantle
tectonic plates
sea level decreased
marine regression
travels through inner layers of earth
body waves
adding material to the ocean floor
sea floor spreading
layer responsible for magnetic field
outer core
the process of the magnetic poles reversing
magnetic reversal