Tectonic Plates

4. hot, molten rock deep inside Earth.
5. supercontinent that existed about 200 million years ago.
7. instrument that records the intensity, duration, and nature of earthquake waves.
13. rigid outer layer of Earth, including the crust and the solid mantel.
14. process of moving part of the lithosphere down into the mantle along a convergent boundary.
15. of Plate Tectonics/The theory that Earth's lithosphere is broken into enormous plates that are in motion.
16. innermost, densest layer of Earth.

1. Floor Spreading/The process by which new ocean floor is continually being formed as magma rises to the surface and hardens into rock.
2. Boundary/A place where the plates that make up Earth's crust
3. that flows out onto Earth's surface from a volcano.
6. Boundary/A place where the plates that make up Earth's crust and upper mantle collide or come together.
8. material, such as soil and rock fragments formed by weathering.
9. layer of the Earth between the crust and the core.
10. thin, rocky outer layer of Earth.
11. Boundary: A place where the plates that make up Earth's crust move past each other.
12. Ocean Ridge/A chain of mountains on the ocean floor.