Across
- 3. Underground reservoir
- 4. Earthquake waves
- 9. Light igneous rock
- 11. Layer beneath crust
- 13. Lava-made rocks
- 15. Surface of Earth
- 18. Wearing down by water
- 20. Like boiling, but slow
- 21. Deep ocean feature
- 22. Water-made rocks
- 23. Land crust
- 25. Inner & Outer _____
- 26. Flat volcano
Down
- 1. Earliest Earth period
- 2. First life on Earth
- 5. Steep volcano
- 6. Rocks changed by heat
- 7. Sliding plate boundary
- 8. Colliding plate boundary
- 10. Earthquake center (on crust)
- 12. Period after Hadean
- 14. Photosynthesis product
- 16. Theory of Plate ________
- 17. Dense igneous rock
- 19. Separating plate boundary
- 24. Sea crust