Plate Tectonics

1. occurs along divergent plate boundaries, where new ocean floor is created as the Earth's tectonic plates spread apart.
3. process that changes preexisting rocks into new forms because of increases in temperature, pressure, and chemically active fluids.
7. tending to move toward one point or to approach each other
10. tell us when and where plants and animals once existed and can be evidence for plate tectonics
11. The Earth's surface is cracked into large pieces called
12. a hard, black volcanic rock
13. a supercontinent that incorporated almost all the landmasses on Earth.
15. break apart or become separated through faulting caused by plate tectonics.
16. process in plate tectonics of the edge of one crustal plate descending below the edge of another.
17. the solid, outer part of Earth.
19. an opening in the Earth's crust through which lava, ash, and gases erupt.
20. the layer of the Earth that lies below the lithosphere.

2. commonly the sights of tectonic activity
4. the first person to formulate a complete statement of the continental drift hypothesis.
5. a line on a rock surface or the ground that traces a geological fault.
6. the gradual movement of the continents across the earth's surface through geological time.
8. a small area or region with a relatively hot temperature in comparison to its surroundings.
9. a way for heat to move
14. a feature of convergent plate boundaries, where two or more tectonic plates meet.
18. the sudden movement of Earth's crust at a fault line.