Across
- 3. A nonliving part of an ecosystem
- 6. trees than in green for more than one season
- 7. a stalked orga
- 10. grassy plain in the tropical region
- 12. zone ocean extends from 1000 to 4 000 meters.
- 13. forested wetland
- 17. relating to or resulting from living things
- 19. Sea region of the Atlantic Ocean
- 20. river flowing into a larger river
- 21. tidal mouth of a large river
Down
- 1. shedding its leaves annually
- 2. zone part of water close to the shore
- 4. zone part of the ocean where enough sunlight
- 5. water covers the ground for long periods
- 8. treeless regions
- 9. collection of organisms in the water
- 11. lack of vegetation
- 14. flooded by water
- 15. is a critical Arctic ecosystem
- 16. Large community of flora
- 18. portion of a plant cropping