Across
- 3. Molten rock that breaks through the Earth's surface
- 4. The thick layer of hot, solid rock between Earth's crust and molten core
- 8. A boundary where two tectonic plates move away from each other
- 10. A deep valley on the ocean floor where subduction takes place
- 14. The rising of regions of Earth's crust to higher elevations
- 16. A vent in Earth's crust through which lava, steam, and ash erupt
- 17. The transfer of heat by the movement of fluid, driving plate motion
- 18. An underwater mountain range formed by plate separation
- 19. A boundary where two tectonic plates slide past each other horizontally
Down
- 1. Molten rock beneath the Earth's surface
- 2. A break or crack in Earth's lithosphere along which rocks move
- 5. The rigid outer layer of Earth consisting of the crust and upper mantle
- 6. Stress that squeezes rock until it folds or breaks
- 7. The plastic-like, flowing layer of the mantle just below the lithosphere
- 9. Stress that stretches and pulls rock apart
- 11. A long valley formed by the sinking of crust where plates diverge
- 12. The thin, rocky, outermost layer of the Earth
- 13. The process where a denser tectonic plate sinks beneath a lighter plate
- 15. A boundary where two tectonic plates collide or move toward each other