| A | B |
|---|
| Dr. Wegener | Discovered theory of continental drift |
| MId-ocean ridge | long underwater mountain range |
| Ancient glacier evidence | Cold climate evidence that continents were once joined |
| Gondwanaland | Africa, S. America, Antarctica, India, Australia |
| Convergent boundary | crust destroyed as plates collide |
| Pangaea | Giant supercontinent that was once joined |
| Divergent boundary | New crust formed along a mid-ocean ridge at this type of boundary |
| Convection | Molten rock rises, cools and sinks in a circular pattern |
| Subduction zone | One plate moves under another |
| Dr. Hess | Discovered sea-floor spreading |
| Fossil remains | Similar plant remains on two separate continents |
| Oceanic-continental convergent | Earthquakes and volcanoes are associated with mountains at a subduction zone |
| Rock formations | Similar mountain ranges on separate continents |
| Rift valley | A crack in the earth's crust that runs along a mid-ocean ridge |
| Plate tectonics | The lithosphere is made up of plates that are constantly moving |
| Laurasia | Made up of N. America, Europe and most of Asia |
| Sea-floor spreading | In the ocean, hot magma pushes up through a crack in the earth and moves away from that area |
| Transform boundary | plate boundary where plates slide past each other |
| Oceanic-oceanic convergent | Volcanic islands and trenches result when these types of plates collide |
| Continental-continental convergent | New mountain ranges form |
