Across
- 6. – Instrument used to measure ground motion.
- 10. – Point on the surface directly above an earthquake focus.
- 11. – Relating to earthquakes.
- 15. – A natural process that could cause harm.
- 16. – Rock formed by cooled magma or lava.
- 17. – Process where one plate sinks beneath another
- 18. – Plastic-like layer plates float on.
- 20. – Layer of hot semi-solid rock beneath the crust.
- 21. – Release of magma and gas from a volcano.
Down
- 1. – Volcanic area away from plate boundaries.
- 2. – Study of plate interactions.
- 3. – Molten rock on the surface.
- 4. – Ocean wave generated by undersea earthquakes or eruptions.
- 5. – Type of process involving plate movement.
- 7. – Force influencing melting inside the mantle.
- 8. – Line of longitude used in mapping.
- 9. – Older scale used to measure earthquake magnitude.
- 12. – Innermost layer of the Earth.
- 13. – Molten rock beneath Earth’s surface.
- 14. – A fracture in rock where movement occurs.
- 19. – Rigid sections of the Earth’s crust. (1 Across)