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Across 2. the reflectiveness of the surface 7. ecosystems can adjust to constant change without distubing individuals 8. are present in higher concentrations in organisms near or at the top of the food chain 10. radiation from the sun that causes sunburn 12. dead organic material 13. an unusual property of water 16. cultivation of a single species 17. a place where an organism lives 20. which law of thermodynamics discribes how during transformation some energy is lost to an unusable form 22. study of energy transformations 25. a species that is sensitive to small changes in environmental conditions 26. water carrying away minerals and organic matter to lower levels of the soil 28. total dry mass of living material in a specified area

Down 1. process of converting simple molecules into more complex compounds without the use of solar energy 3. eats plants & animals 4. nitrates are converted to nitrites which are converted to nitrogen gas 5. largest resevoir of carbon 6. representations of the energy flow in a food chain 9. Fertilizer run off can cause algae to do this 11. what trophic level would algae be in? 14. cannot make ther own food 15. downlard pull of water 18. alive 19. These orgnaisms make their own food. 21. the narrow zone around the earth that harbors life 23. reduces the mobility of frog sperm cells 24. a plant commmonly found on lawns that has nitrogen fixing nodules. 27. slowly decomposing plant matter produced in low oxygen environments