Born on November 1, 1880, Alfred Lothar Wegener earned a Ph.D in astronomy from the University of Berlin in 1904

Convergent: to come together

Divergent: When the plate tectonics start to split.

Transform boundarys: when the plates slide past each other.

the tectonic plate just off the boarder of washington the juan de fuca plate.

the cascde were caused by two tectonic plates coming together and going up to form a moutain.

convection currents are when hot air rises and cool air cools so inside the earth the further they go down the hotter it is and so all the hot rises and when it cools off at the top it sinks and come back down and then heats up and keeps on doing that circut. these affect the tectonic plates because they cause the plates to move.

rift zone is a feature of some volcanoes, especially shield volcanoes, in which a linear series of fissures in the volcanic edifice allows lava to be erupted from the volcano's flank instead of from its summit.

subduction zone is a boundary where two tectonic plates collide and, because of differences in density, one dives beneath the other. This occurs frequently where an oceanic plate meets a continental plate. The denser and thicker oceanic plate is shoved underneath the less dense continental plate.