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Across 1. a single living being 4. the removal of soluble minerals by percolation 6. the extent to which a surface can reflect the light that strikes it 9. a living factor that influences an organism 15. a representation of feeding relationships amongs organisms in an ecosystem 17. a species sensitive to small changes in environmental conditions 20. the proccess by which cells break down glucose into carbon dioxide and water, releasing energy 23. the number of species in an ecosystem 25. an organism that is incapable of making its own food and so must feed on other organisms to gain energy 26. also known as the hydrological cycle it is cycled to the air to the ground and back into the atmosphere 27. the proccess by which non-photosynthetic organisms convert inorganic chemicals to organic compounds without solar energy 28. the boundary between the layer of soil that is saturated with water 29. the cycle where the gas is put into the air by photosynthesis

Down 2. cultivation of a single species 3. the proccess in which plant cells break down carbon dioxide into oxygen and glucose 5. a form of nitrogen used by plants that have been created by nitrogen fixing bacteria 7. a resevoir that can hold carbon whether in organic or inorganic form 8. waste from plants and animals including their dead remains 10. the cycle of matter in which carbon atoms moves from an inorganic form to an organic form and then ro an inorganic form 11. the diagram which is always a pyramid no matter which ecosystem one looks at 12. a scientific study of energy transformations to do with heat 13. consists of a biological and geological cycle, it cycles between biotic and abiotic components 14. describes any ecosystem with constant change in which components can change with out disturbing the entire system 16. an organism that can synthesize organic compounds from inorganic chemicals without using solar energy 18. a level in which organisms can be classified by their specific characteristics 19. the proccess by which bacteria put nitrogen gas back into the atmosphere 21. an organism that makes it's own food 22. a non-living factor that influences an organism 24. an organism that feeds on detritus