Across
- 4. The ancient supercontinent that included all of Earth's landmasses
- 5. Vibrations caused by sudden movement of rock along a fault.
- 6. A break in Earth's crust along which movement occurs.
- 12. Plates: Massive, rigid, moving pieces of the Earth's lithosphere.
- 13. zones: cold oceanic lithosphere sinks back into the mantle and is recycled
- 15. Boundary: Where two plates move toward each other.
- 19. The outermost layer of the Earth.
- 21. The layer of hot, solid material between the crust and core.
- 22. Spot: A volcanically active area far from a plate boundary.
- 23. Boundary: Where two plates slide past each other horizontally.
- 24. Triggered by large, underwater earthquakes or volcanic eruptions.
Down
- 1. The vertical elevation of the Earth's surface
- 2. Spreading: Process forming new oceanic crust at mid-ocean ridges.
- 3. tectonics:the understanding that the top layer or lithosphere of the Earth's crust is divided into many large rocky plates
- 7. The soft, plastic layer in the upper mantle that the plates move on.
- 8. Boundary: Where two plates move away from each other.
- 9. Drift: Hypothesis that continents move slowly across the Earth's surface.
- 10. The rigid outer layer of the Earth, consisting of the crust and upper mantle.
- 11. Valley: A deep valley formed where two plates move apart.
- 14. Currents: Movement in the mantle caused by heat differences, driving plate movement.
- 16. The point on the surface directly above an earthquake's origin.
- 17. The process where one tectonic plate sinks beneath another.
- 18. A vent in the crust where magma and gases erupt.
- 20. Ridge: An underwater mountain chain formed by divergent plates.
- 21. Molten or semi-molten rock beneath the surface.
