Earth's Dynamic Crust and Interior

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

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