Earth Word

6. a network of satellites and receiving devices used to determine the location of something on Earth
8. long, narrow depressions on the seafloor that form at the boundary of tectonic plates
11. a chain or group of islands that forms from volcanic activity along a subduction zone
16. what happens when two blocks of the earth suddenly slip past one another
18. the layer of granitic, sedimentary, and metamorphic rocks, which form the continents and the areas of shallow seabed close to their shores
19. a long crack in the surface of the earth
20. A geologic process in which one edge of one lithospheric plate is forced below the edge of another
21. he is most remembered as the originator of continental drift hypothesis
23. the location on the surface of the Earth directly above where the earthquake starts
25. the geological process in which earthen materials are worn away and transported by natural forces such as wind or water
26. any of several continuous submarine mountain chains rising from the ocean floor
28. a large plume of hot mantle material rising from deep within the Earth
29. When two plates come together
30. smaller earthquakes that occur in the same general area during the days to years following a larger event or "mainshock."

1. openings, or vents where lava, tephra (small rocks), and steam erupt onto the Earth's surface
2. the breaking down or dissolving of rocks and minerals on the surface of the Earth
3. a massive, irregularly shaped slab of solid rock, generally composed of both continental and oceanic lithosphere
4. the movement of an ice sheet over a land surface
5. a seismic wave that travels along or parallel to the earth's surface
7. the predicted future landmass might be extremely hot, plagued by volcanoes and largely inhospitable
9. occurs when two tectonic plates move away from each other.
10. the outermost solid layer of the lithospheric tectonic plates under the oceans that covers much of the Earth's surface
12. The relative movement between the two sides of a geologic fault.
13. the movement of continents resulting from the motion of tectonic plates
14. The density- and heat-driven cycling, transfer or circulation of energy through which material initially warms up and becomes relatively less dense
15. places where plates slide sideways past each other
17. a series of extremely long waves caused by a large and sudden displacement of the ocean
22. the laying down of sediment carried by wind, flowing water, the sea or ice
24. a supercontinent that incorporated almost all the landmasses on Earth
27. a transverse or longitudinal earthquake wave that travels through the interior of the earth