Across
- 5. under the ground
- 7. along the crest of some ridges
- 9. has magma under the ground
- 10. elevated areas of the sea floor
- 15. when igneous rocks melt over a temp range
- 17. about the ground
- 18. mountains formed in part by igneous activity
- 19. when igneous rocks melt over a temp range
- 20. narrow, elongated depression of the sea floor
Down
- 1. fracture in a volume of rocks
- 2. shakes the earth
- 3. moves apart
- 4. linear zones of irregular topography
- 6. oceanic crust produced at the crest of mid-ocean ridges
- 8. a chain of volcanic islands
- 11. what earthquakes and volcanoes leave behind
- 12. able to float
- 13. a type of science
- 14. when to tectonic plates move away
- 16. two plates slide past each other