| Term | Definition |
|---|
| Alfred Wegener | Continental Drift |
| Biggest form of evidence for continental drift | continents fit together |
| fossil evidence for continental drift | Mesosaurus (reptile) found on S. America and Africa/ Glossopteris (tropical plant) found on Antarctica |
| Climate evidence for continental drift | glaciers and tropical plants in places that don't make sense |
| Rock evidence | similar rocks in Appalachian mtns and mtns in Greenland and Europe |
| Pangea | all land- big landmass |
| sonar used to find what? | mid-ocean ridge |
| Glomar Challenger | got core samples |
| Glomar Challenger discovered what? | younger rocks closer to ridge, older rocks farther |
| SEAFLOOR SPREADING | new seafloor formed when magma forced upward at mid ocean ridges |
| Harry Hess | Seafloor spreading |
| Magnetic clues | rocks show that magnetic poles switch |
| Crust is made up of | solid rock |
| lower mantle made up of | molten rock |
| outer core made up of | liquid iron and nickel |
| inner core made up of | solid iron and nickel |
| results of boundaries | earthquakes, volcanoes, mountains, valleys |
| Divergent Boundary | pulling apart |
| O-O Divergent | makes mid ocean ridge |
| C-C divergent | rift valley |
| O-C divergent | DOESN'T EXIST |
| Convergent Boundary | boudary between two plates that are coming together |
| O-O Convergent | ocean crust goes under ocean crust and forms trench and subduction zone- volcanic islands |
| C-C convergent | NO SUBDUCTION ZONE- forms mountain ranges |
| O-C Convergent | trench, subduction zone- chain of volcanic mtns |
| Transform Boundary | two plates are sliding past eachother or moving in the same direction at different rates |
| earthquakes happen at ____ transform boundaries | ALL |
| Hot spots | (not a plate boundary) hot mantle melts rocks above it and forces magma up. stays in same place- islands form |
| does a hot spot move with a plate? | NO |
| examples of hotspot islands | hawaian islands, yellowstone |
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