click below
click below
Normal Size Small Size show me how
Science
Continental Drift #1
| Question | Answer |
|---|---|
| Continents slowly drift or move over earth surface | Continental drift |
| A device that bounces sound waves off underwater objects and records echoes of these sound waves | Sonar |
| Gigantic super continent that existed 306 million years ago ..... Means all lands | Pangea |
| The process of continents adding new material to the ocean floor | Sea floor spreading |
| Impression of an ancient organism that has been preserved in rock | Fossil |
| Deep underwater canyons where the oceanic crust sinks back into the mantle. Subduction takes place here | Deep-ocean trenches |
| An undersea mountain chain where new ocean floor is produced | Mid-ocean ridges |
| The process by which the ocean floor sinks beneath a deep ocean trench and back into the mantle | Subduction |
| Scientist who introduced the theory of continental drift | Alfred Wegener |
| Earth's crust broken into these many pieces | Plates |