*Earthquakes and Plate Tectonics Set 1 review
Order by
11 terms
Terms | Definitions |
|---|---|
 Continental Crust | The portion of the earth's crust that primarily contains granite, is less dense than oceanic crust |
| Continental Drift | Wegener's theory that the continents were joined as a single land mass called Pangaea, and drift slowly across earth's surface |
| Convection Current | current in the earth's mantle set in motion by differences in density of the mantle |
| convergent plate boundary | places where edges of adjacent plates are colliding |
| divergent boundary | places where edges of adjacent plates are spreading apart |
| Mid-Atlantic ridge | divergent boundary in the middle of the Atlantic Ocean |
| mid-ocean ridge | a chain of undersea mountains running through the center of an ocean |
| oceanic crust | The portion of earth's crust that primarily contains basalt, is relatively dense |
| Pangaea | ancient land mass made up of all the continents that began to break apart about 200 million years ago |
| plate tectonics | the theory that the earth's crust consists of large rigid plates resting on a fluid like layer of denser rock. These plates slide around causing the edges to collide, separate, and slide past each other |
| Alfred Wegener | A German scientist who proposed the theory of continental drift |
First Time Here?
Welcome to Quizlet, a fun, free place to study. Try these flashcards, find others to study, or make your own.