Across
- 3. middle layer of earth
- 4. a weak earthquake
- 7. point under ground where an earthquake begins
- 10. sediment worn away
- 12. ground level above the focus
- 13. people who study earthquakes
- 16. sand and mineral fragments
- 17. outer layer of the earth
- 18. weathering by acid
- 19. float like rafts
- 20. belt, regions where earthquakes happen often
- 21. monstrous ocean waves
Down
- 1. earthquake strength
- 2. rocks break and crumble
- 5. mid-oceanic _____
- 6. tremor after an earthquake
- 8. center of the earth
- 9. study of the earth
- 11. scale that measures earthquake strength
- 13. study of earthquakes
- 14. boundary between crust and mantle
- 15. studies the earth
- 16. essential for all plant life