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BW 6gr Plate Tecto

Plate Tectonics

Constructive Forces Shape the surface by building up mountains and landmasses.
Destructive Forces Slowly wear away away mountains and eventually other features on the surface.
Layers of the earth Crust, Mantle Core
Crust Layer of rock that forms Earths outer skin, It has rocks, mountains, soil and water. It includes the dry land and ocean floor. Basalt and Granite
Mantle 2 layers - A soild material of hot rock in the upper rigid layer callled lithosphere, soft layer called asthenosphere
Core Layer comes after mantle. consists of 2 parts liquid outer core and solid inner core
Outer core Layer of molten metal the surrounds the inner core.
Inner core Dense ball of solid material.
Wegeners Theory of Continental drift All continents had once been joined together in a single landmass called Pangaea and have since drifted apart.
Theory of Plate tectonics Geological theory that states that pieces of Earths lithosphere are in constant slow motion driven by convection currents in the mantle.
The process of sea floor spreading The process by which molten material adds new oceanic crust to the ocean floor.
Subduction The process by which oceanic crust sinks back into the mantle beneath deep ocean trenches at a convergent plate boundary.
Plate boundaries The edges of different pieces of the lithosphere where rocks have slipped past each other forming - Transform, divergent and convergent.
Created by: amtmweir