Across
- 3. Center of the Earth
- 5. Person who studies earthquakes
- 10. Most common element in the Earth's crust
- 12. Force displayed by rocks sliding past each other
- 13. A volcano that has not erupted in many years
- 14. Type of wave that travels the fastest
- 15. Sudden movement of the Earth's crust and upper mantle
- 17. Force displayed by rocks being stretched apart
- 19. Molten rock that flows from volcanoes
Down
- 1. Place where an earthquake originates
- 2. Layer of the Earth on which mountains are formed
- 4. Occur where crustal plates move apart
- 6. Area of an earchquake, directly above the origin
- 7. Type of wave that produces the greatest destruction
- 8. Tool used to measure seismic waves
- 9. Layer of the Earth from which magma originates
- 11. Zone in which seismic waves are not detected
- 16. Caused by underwater earthquakes
- 18. Type of fault formed by forces of tension