Across
- 4. - A number that shows the magnitude of the Earthquake.
- 5. - A device that measures minute changes in the angle of the ground's slope.
- 9. - A scientist who studies the Earth.
- 11. - Earthquake waves.
- 13. - Molten rock below the surface of the Earth.
- 15. - The first place that the rocks break below the surface.
- 16. - A recording of the Earth's movement made by a Seismograph.
- 18. - A crack in the crust where the Earth moves.
- 19. - A large fault that runs through San Francisco, California.
- 20. - Molten rock that flows out of a volcano.
- 21. - Hot liquid rock 2200 km thick.
Down
- 1. - Hot, solid Iron and Nickel in the middle of the Earth.
- 2. - The point on the surface directly above the Earthquake.
- 3. - A type of fault where the earth moves sideways.
- 4. - The area around the Pacific ocean where most of the world's volcanos are found.
- 6. - Trembling and vibrations of the ground.
- 7. - A town in Italy covered by ash when Mount Vesuvius erupted.
- 8. - An opening in the Earth's crust were lava, rock, ash and gasses escape.
- 10. - An island with the most active volcano in the world.
- 12. - The thin, outer layer of the Earth with mountains, valleys and ocean floors.
- 14. - A "Harbor Wave" that occurs when an Earthquake occurs under the ocean.
- 17. - The thickest part of the Earth (2900 km thick).