Across
- 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.
Down
- 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.