Across
- 2. made up of things that are different
- 4. slowly wearing away with wind or water
- 9. a long, narrow groove or ditch
- 11. the center
- 14. look at something very quickly
- 16. it controls itself
- 17. very old, from a time before history was recorded
- 20. is needed or very important
- 21. to go or work underwater
- 23. mountain top or the highest point
- 24. it has no end and lasts forever
Down
- 1. not doing anything
- 3. guards who keep watch
- 5. very interesting
- 6. a deep crack or opening in the ground
- 7. living things that grow and are healthy
- 8. strong anger
- 10. it is made up of living matter
- 12. it sparkles or shines
- 13. crashes into something
- 15. firmly set into something that surrounds it
- 18. explodes or suddenly breaks into pieces
- 19. you understand it
- 22. you control it from a distance