Across
- 3. A device used to record earthquake
- 7. A continuous mass on the ocean floor.
- 8. Vibration of Earth
- 9. The science that studies Earth.
- 10. The outer portion of the earth.
- 12. Consolidated mixture of minerals.
- 13. A record made by a seismograph.
- 14. two plates slide past each other.
- 18. A theory
- 19. Mountains formed by igneous activity
Down
- 1. two plates move
- 2. thick part of the Earth’s crust
- 4. Second type of earthquake wave
- 5. Rigid sections of the lithosphere
- 6. The thin part of the Earth’s crust
- 7. A mass of molten rock
- 11. moving apart.
- 13. A slab of rock thrusts into the mantle.
- 15. A break in a rock
- 16. A depression in the seafloor
- 17. A concentration of heat in the mantle