Plate Tectonics

6. The rigid outer part of the earth, consisting of the crust and upper mantle.
8. The relatively think part of the earth's crust that underlies the ocean basins.
10. A long, narrow ditch.
11. Hot fluid or semi-fluid material below or within the earth's crust from which lava and other igneous rock is formed by cooling.
12. A type of fault whose relative motion in predominately horizontal, in either a sinistral (left lateral) or dextral (right lateral) direction.
13. Boundary An actively forming region where two (or more) tectonic plates or fragments of the lithosphere move toward one another and collide.
14. The sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate.
16. A sudden and violent shaking of the ground, sometimes causing great destruction, as a result of movements within the earth's crust or volcanic action.

1. A small area or region with a relatively hot temperature in comparison to its surroundings.
2. A large elongated depression with steep walls formed by the downward displacement of a block of the earth's surface between nearly parallel faults or fault systems.
3. A mountain or hill, typically conical, having a crate or vent through which lava, rock fragments, hot vapor and gas are being or have been erupted from the earth's crust.
4. A linear feature that exists between two tectonic plates that are moving away from each other.
5. The relatively thick part of the earth's crust that forms the large landmasses.
7. Ocean Ridge An underwater mountain range, formed by plate tectonics.
9. The biggest crash scene on earth where boundaries mark the collision between two of the planet's tectonic plates.
15. Hot molten or semi-fluid rock erupted from a volcano or fissure, or solid rock resulting from cooling of this.