Plate tectonics
~A theory explaining the structure of the earth's crust and how it came to be.
Continental Drift
~A continental drift is when one plate moves from where it was normally.
Pangaea
~Before the whole world moved and came to be it was called Pangaea.
Asthenosphere
~Is the upper layer of the earths mental
Lithosphere
~The rigid outer part of the earth
Mid-Oceanic ridge
~The outer core where the ocean is at.
Rift valleys
~A rift valley is a large elongated depression with steep walls formed by the downward displacement.
Subduction
~the sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate.