Plate tectonics Word Scramble
|
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
| Question | Answer |
| divergent | boundary where 2 plates are moving away from each other; associated with mid-ocean ridges |
| convergent | boundary where 2 plates are colliding; associated with deep-sea trenches, volcanoes, and mountains |
| transform | boundary where 2 plates are sliding past one another; associated with faults and earthquakes |
| Wegener | man who came up with the theory of continental drift |
| Hess | man given credit for the theory of plate tectonics |
| basalt | rock that covers most of the ocean floor |
| Pangaea | name of the supercontinent 200 million years ago |
| continental drift | theory stating the continents used to be joined in a single land mass and have since drifted to their current locations |
| subduction | one tectonic plate is being forced under another tectonic plate |
| mid-ocean ridge | chain of underwater mountains |
| deep-sea trench | long, narrow depression on the ocean floor; occurs at convergent boundaries |
| plate tectonics | theory that the Earth's crust is broken into plates which move in different directions at different speeds |
| lithosphere | strong, rigid layer of Earth including the uppermost mantle and overlying crust |
| asthenosphere | a weak plastic-like layer of the mantle situated below the lithosphere; convection currents happen here |
| seafllor spreading | theory stating that new crust is made at mid-ocean ridges and old crust is destroyed at deep-sea trenches |
| rift valley | long narrow depression that forms when continental crust separates at a divergent boundary |
| fault | fracture in the Earth's crust; transform boundary |
Created by:
ebarnett
Popular Earth Science sets