Unit 7 - Plate Tectonics

convergent boundary

A plate boundary where two plates move toward each other.

divergent boundary

A plate boundary where two plates move away from each other.

subduction

One plate going under another plate

transform boundary

A plate boundary where two plates move past each other in opposite directions

mountians

converging continental crust and continental crust

volcanos

converging continental crust and oceanic crust; subduction zone

ocean trench

converging oceanic crust and oceanic crust; subduction zone

rift valley

diverging continental crust

ocean ridge; ocean basin

diverging oceanic crust

earthquake

movement along transform boundary

hot spot

An area where magma from deep within the mantle melts through the crust above it

supervolcano

Massive volcano that can produce unbelievably enormous, but rare, eruptions.

crust

Earth's outermost layer.

mantle

the layer of the earth between the crust and the core

core

Center of the earth

lithosphere

A rigid layer made up of the uppermost part of the mantle and the crust.

Pangaea

large, ancient landmass that was composed of all the continents joined together

Alfred Wegener

scientist who came up with the continental drift theory

transform boundary

convergent subduction boundary

divergent boundary

convergent boundary