Across
- 6. The motion where two plates move towards each other
- 7. The process where one tectonic plate is forced beneath another
- 9. A giant slabs of solid rock that make up the Earths outer crust
- 10. The upper layer of Earths mantle below the lithosphere
- 11. A sudden violent shake of the ground
- 13. The liquid layer between the mantle and inner core mainly made from molten iron and nickel
- 15. The motion where two plates move away from each other
- 17. The innermost solid layer of the Earth
- 19. A mountain or hill with a crater through which lava, rock fragments, hot vapor, and gas erupt
- 20. A large ocean wave caused by an underwater earthquake
Down
- 1. The rigid outer part of Earth
- 2. Convergent or Divergent boundary’s in which tectonic plates move
- 3. Underwater hydrothermal vent on the ocean floor
- 4. A underwater mountain range formed when two plates pull apart
- 5. The outermost rigid layer of the Earth
- 8. The thin part of Earths crust which underlies the ocean basins
- 12. The thick solid layer between the Earths crust and outer core
- 14. A plate boundary where two plates slide past each other horizontally
- 16. When two tectonic plates collide and one slides beneath the other
- 18. A measure of the energy released by an earthquake