Super-continent
Pangea
Gradual movement of continents over time
continentaldrift
Preserved remains
fossils
Guy who posed continental drift theory
Alfredwegner
sliding of plates in opposite directions of same direction at different rates
transformboundry
Plates pull apart
divergent
Plates collide
convergent
Violent shaking of the ground
earthquake
A large, steeper hill
mountains
A large narrow valley lying between 2 raised pieces of land
Ridgevalley
Theory that hot, less dense material below Earth's crust rises toward the surface of mid-ocean ridges
seafloorspreading
Area near electric currents
magneticfield
Region of Earth where tectonics meet
subductionzone
Guy who posed the theory of seafloor spreading
harryhess
Part of Earth consisting of crust and upper mantle
lithosphere
Layer beneath the lithosphere
asthenosphere
Earth's crust and part of the upper mantle are broken into sections
platetectonics