Across
- 2. no more living members of a group exist
- 3. Giant ocean wave with enormous power
- 6. ring shaped reef, islands, or chain of islands
- 8. Area of Japan where frequent earthquakes & volcanic eruptions occur
- 10. The gradual transition from fertile to less productive land.
- 12. Non- violent disobeying of laws
- 13. A piece of land completely surrounded by water
- 15. A man-made artificial water route
- 17. native to the region in which they are found
- 18. Hurricanes that bring heavy rain and flooding
- 19. Closely related group of islands
- 20. A region drained by a river system
Down
- 1. Does not have complete control
- 4. Tropical grasslands
- 5. The height above sea level
- 7. Fine particles of soil
- 9. non-native plants and animals that disturb habitats
- 11. Variety of species in an ecosystem
- 14. Giving off energy caused by the breakdown of atoms.
- 16. Continuous extent of land