Across
- 2. long and narrow ditch
- 4. mountain that sprays lava
- 6. fossils found in south America and africa
- 9. a system meant to represent something
- 10. steps of a whole plan
- 12. 7 main lands of earth
- 14. land separating
- 15. thing that happens when water or lava flows
- 16. how often or fast something happens
- 18. ____ of fire
- 19. _____ tectonics
Down
- 1. _______ridge
- 3. plates move together
- 5. outer part of something
- 7. where earthquakes happen most
- 8. water sprays out of a hole in the ground
- 9. soft or hard rock underneath plates
- 11. ground shakes
- 13. Plates move apart
- 17. _____layer