Plate Tectonics

3. an opening in the Earth's crust through which lava, ash, and gases erupt.
4. the gradual movement of the continents across the earth's surface through geological time.
8. process in plate tectonics of the edge of one crustal plate descending below the edge of another.
12. the layer of the Earth that lies below the lithosphere.
13. The Earth's surface is cracked into large pieces called
15. a supercontinent that incorporated almost all the landmasses on Earth.
16. the sudden movement of Earth's crust at a fault line.
18. tell us when and where plants and animals once existed and can be evidence for plate tectonics

1. tending to move toward one point or to approach each other
2. a line on a rock surface or the ground that traces a geological fault.
5. the first person to formulate a complete statement of the continental drift hypothesis.
6. a small area or region with a relatively hot temperature in comparison to its surroundings.
7. occurs along divergent plate boundaries, where new ocean floor is created as the Earth's tectonic plates spread apart.
9. a way for heat to move
10. the solid, outer part of Earth.
11. process that changes preexisting rocks into new forms because of increases in temperature, pressure, and chemically active fluids.
12. commonly the sights of tectonic activity
13. a feature of convergent plate boundaries, where two or more tectonic plates meet.
14. a hard, black volcanic rock
17. break apart or become separated through faulting caused by plate tectonics.