Across
- 4. the gradual movement of the continents across the earth's surface through geological time.
- 5. process that changes preexisting rocks into new forms because of increases in temperature, pressure, and chemically active fluids.
- 7. The Earth's surface is cracked into large pieces called
- 9. tell us when and where plants and animals once existed and can be evidence for plate tectonics
- 10. the layer of the Earth that lies below the lithosphere.
- 12. a way for heat to move
- 14. break apart or become separated through faulting caused by plate tectonics.
- 15. an opening in the Earth's crust through which lava, ash, and gases erupt.
- 17. process in plate tectonics of the edge of one crustal plate descending below the edge of another.
- 18. a feature of convergent plate boundaries, where two or more tectonic plates meet.
Down
- 1. the sudden movement of Earth's crust at a fault line.
- 2. a supercontinent that incorporated almost all the landmasses on Earth.
- 3. a line on a rock surface or the ground that traces a geological fault.
- 6. a hard, black volcanic rock
- 8. a small area or region with a relatively hot temperature in comparison to its surroundings.
- 10. the first person to formulate a complete statement of the continental drift hypothesis.
- 11. occurs along divergent plate boundaries, where new ocean floor is created as the Earth's tectonic plates spread apart.
- 12. tending to move toward one point or to approach each other
- 13. the solid, outer part of Earth.
- 16. commonly the sights of tectonic activity