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Across 7. An underwater landmass that extends from a continent, resulting in an area of relatively shallow water known as the ____ shelf 8. A type of symbiosis that benefits one of the species but neither harms nor helps the either 9. When a community arises in a lifeless area that has no soil (2 Words) 14. Where the land meets the ocean; _____Zone 16. It turns solid nitrogen back to gaseous form 17. A major regional or global biotic community characterized mainly by the dominant forms of plant life and the prevailing climate 19. Organisms that obtain chemical energy by feeding on the producers or on other ____s 20. Organism that is not as abundant, but holds important ecological niches (2 Words) 24. Process that turns ammonium into solids usable by plants 26. Process that turns nitrogen gas into ammonium (2 Words) 28. An area of dry land that is covered with bushes and short trees 29. Habitat flooded with water at least some of the time 31. The global ecosystem which encompasses all living things in the lithosphere, atmosphere, and hydrosphere and is characterized by patchiness 32. A still body of water that is smaller than a lake 33. Organisims that produce their own food

Down 1. Environmental factors arising from organisms that may shape or affect the biosphere; ____ factors 2. Change that follows when a disturbance damages an existing community but leaves the soil intact (2 Words) 3. Large and still bodies of water 4. The scientific study of interactions between organisms and their environment 5. Forests that mainly contain large trees with broad leaves that fall off in autumn (2 Words) 6. A transition area that is formed when a freshwater river meets the ocean 10. Symbiosis in which one species benefits and one is harmed 11. Fast moving freshwater biome; _____/stream 12. When one species kills and eats the other 13. nutrient cycles consisting of biotic and abiotic components; ______ cycles 15. Moist subarctic forests dominated by conifers that begin where the tundra ends 16. Fungi and bacteria that complete the breakdown process by recycling the nutrients like dead tissues and wastes back into the ecosystem 18. What biome is characterized by grasslands with small trees located primarily near and immediately north and south of the equator 21. The pathway of food transfer from one trophic level to another (2 Words) 22. Symbiosis in which both species benefit 23. Organisms that obtain energy from consuming other organisms 25. Environmental factors that arise from inorganic sources; _____ factors 27. Organisms that become established outside their native range; ______ species 30. Frozen grassland or plain