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BW 6gr Plate Tecto
Plate Tectonics
| Question | Answer |
|---|---|
| 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
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