one supercontinent where all 7 continents were all connected as one large landmass.

when a denser plate sinks below a lesser dense plate at a convergent plate boundary

forms where 2 plates collide

forms when 2 plates seperate

forms where 2 plates slide past each other.

circulation of magma in the mantle cause by differences in temperatures and density.

makes up the earths crust.

makes up the upper mantle and crust.

theory that earth's surface is made of crustal plates that move and float on top of mantle

theory that the continents are in constant motion

when a magnetic field reverses direction

propossed the theory of seafloor spreading, new oceanic crust formed, contributes to the movement of tectonic plates.

A mountain range in the middle of the ocean

magnetized state where objects reverse direction-orienty themselves to point south

magnatixed state where objects orient themselves to point North

2 parts divide causing seafloor to separate, magma rises up through the cracks creating new crust.

the layer of hot, semi-solid rock beneath earth's crust and above the core, Responsible for movements that divide plate tectonics.

natural processes that build or create features on earth's surface, like mountains, volcanos, and landforms, Formed by deposition.

natural processes that break down/wear away earth's surface features through erosion

a german scientist who proposed the theory of continental drift, continent's were once together and drifted apart.