Environmental Science cross puzzle

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Across
  1. 3. Essential element found in cysteine
  2. 5. SCIENCE Organized body of knowledge obtained through study and experimentation
  3. 6. Water stored beneath Earth's surface
  4. 8. Excessive algal growth caused by nutrient pollution
  5. 11. Study of weather and the atmosphere
  6. 16. All water found on Earth
  7. 17. ENVIRONMENT Everything that affects an organism during its lifetime
  8. 18. Study of species distribution
  9. 19. Founder of the Four Laws of Ecology
  10. 21. Part of Earth where life exists
  11. 22. Widely accepted explanation of natural phenomena
  12. 23. Movement of water through plants
  13. 25. Study of interactions between organisms and their environment
  14. 26. Corrosive rain caused by sulfur dioxide
  15. 27. Makes up about 78 percent of Earth's atmosphere
  16. 28. Biologically important inorganic form of phosphorus
  17. 29. Natural process of converting biodegradable waste into fertilizer
  18. 30. Conversion of nitrates into nitrogen gas
Down
  1. 1. Group of the same species living in one area
  2. 2. Measure of disorder in a system
  3. 4. Protective blanket of gases surrounding Earth
  4. 7. First step in the scientific method
  5. 9. Outer solid layer of Earth
  6. 10. Living and nonliving components interacting together
  7. 12. Process that converts carbon dioxide into organic carbon
  8. 13. A testable explanation for an observation
  9. 14. All organisms living in one area
  10. 15. Second most abundant element in living organisms
  11. 20. Process where liquid water becomes water vapor
  12. 24. Place where elements are stored in a cycle