| A | B |
|---|
| Alfred Wegener | Theory of Continental Drift-1915 |
| Harry Hess | He along with Robt. Dietz Discovered Mid-Ocean Ridges- 1940' using Sonar in WWII then proposed the theory of Sea Floor spreading in 1960's |
| Inge Lehmann | 2 cores - 1936. Outer is liquid. |
| Plate Tectonics | Theory of How the earth's continental plates form, move, and subduct-creation destruction movement |
| Isostasy | Balance of the earth's constructive and destructive forces |
| Asthenosphere | Plasticy, jelly like layer of the earth made up of upper mantle. 250 km thick |
| Lithosphere | Layer of earth- made up of Crust plus upper mantle. 100 km thick. Plates. |
| Mid Ocean Ridge | An undersea mountain range where new ocean floor is being produced; divergent plate boundary |
| Trench | V-shaped valley that lies along the bottom of the ocean where plates are subducted. |
| Rift valley | A tear in the ocean floor where molten rock seeps up from the mantle to create new ocean floor |
| Sea Floor Spreading | The process or force that causes continents to drift by which molten material adds new ocean crust |
| Subduction Zone | Area on the earth where an oceanic plate slips under a continental plate and produces magma at a convergent boundary |
| Volcano | A spot in the crust where magma has come to the surface and created lava Mountains |
| Chile 1960 | Site of earth's largest recorded earth quake-9.5 |
| Andes | Volcanic mountains along the west coast of S. America. Created from the collision of the Nazca and S. American plates. |
| Pangaea | the name for "all land" continent which came together 250-300 mya. |
| San Andreas Fault | Strike slip fault located in California along the boundary between the Pacfic and N. American Plates. Transform boundary. |
| Convection Currents | Conveyor Belts-A transfer of heat by the movement of a liquid - magma in the mantle |
| Plate Boundaries | Area on the earth where 2 Lithospheric plates meet or slide past or separate. Where most earthquakes and volcanoes occur. |
| Himalayas | Mountain range fomed some 30-50 mya from the convergence of the Indian and Eurasian plates. |
| Cascades | Mountain range in the Pacific NW created from subduction of the Pacific and Juan De Fuca plates under the N.American plate. |
| Alps | Mts. created from the convergence of the Eurasian and African Plates. |
| Ring of Fire | Area on the earth located around the Pacific rim where a majority of all the earthquakes and volcanoes occur. |
| Sea Floor Spreading | The idea that magma flowing out of the sea floor drives the continents apart causing them to drift |
| J. Tuzo Wilson | Put forth the idea of Plate Tectonics 1965 |
| Hot Spots | Place in the mantle where lava pools and creates volcano's above. Hawaiin Islands and Yellowstone are 2 examples. |
| Divergent Boundary | Place where 2 plates separate, move apart |
| Convergent Boundary | Place where 2 plates come together |
| Transform Boundary | place where 2 plates slide past each other |
| Crust | Thinnest topmost layer of the earth 5-70 km |
| Mantle | Thickest 2 layer of earth 2900km thick |
| Outer Core | 2nd thisckest liquid layer of the earth 2300 km |
| Inner Core | 3rd Thickest solid layer of the earth. So dense that it can't melt 1200 km |
| Density | Mass divided by volume. It increases with depth into the earth due to the wt. of the rock above it. |
| Pressure | Increases with depth into the earth |
| Temperature | Increases with depth |
| Evidence | information, facts, data that supports your idea |
| transform Faults | This cracks that run across mid-ocean ridges |
