Across
- 2. the section of the lithosphere that moves around Earth's solid surface
- 4. very fast, large wavelength ocean wave or waves produced by impact events and disturbances of the ocean floor caused by earthquakes, volcanic eruptions or landslides
- 6. the giving off of gases, lava and/or lava rocks onto Earth's surface or into the atmosphere through the opening or vent of a volcano
- 8. the plastic, partly solid, partly liquid layer of Earth's mantle just below the lithosphere that allows plate movements
- 10. the boundary between two plates that are spreading apart at a mid-ocean ridge or at a continental rift zone
- 11. a mountain range at the bottom of the ocean, composed mostly of volcanoes and lava flows
- 12. the boundary at which plates slide by the each other (San Andreas)
- 15. the part of Earth's crust (upper lithosphere) that makes up the continents and larger islands
- 17. major regions of volcanic activity that are usually in the interior of plates away from plate boundaries
- 18. the portion of Earth's crust that is usually below the oceans and is not associated with continental areas
- 19. the plate tectonic process in which one of the plates at a convergent boundary sinks under the other
- 20. the whole crust and the uppermost portion of the mantle
Down
- 1. the energy waves given off by an earthquake
- 3. the mostly solid part of Earth between the crust and the outer core
- 5. the place on Earth's surface lying directly above the focus, or the origin of an earthquake
- 7. the boundary between two colliding plates
- 9. a natural, rapid shaking of the lithosphere caused when rocks are displaced due to the release of energy stored in rocks
- 13. the long, steep and narrow depression produces by the bending down of subducting plates which warps the crust
- 14. the outermost portion of Earth's solid lithosphere
- 16. a mound or mountain composed of extrusive igneous rock