Across
- 5. protecting the environment
- 8. continuous piece of land
- 11. fine particles of soil
- 12. chain of islands
- 14. man made water route
- 15. flat arctic land
- 16. the study of past events
- 17. complete control of the market
- 19. many cultures in one place
Down
- 1. hurricanes that bring rain and flooding
- 2. spread of elements of culture
- 3. land surrounded by water on all sides
- 4. redirecting water to crops
- 6. height above sea level
- 7. very large plains
- 9. permanently frozen ground
- 10. giant ocean wave
- 13. large body of salt water
- 18. very dry with high temperatures