Unit 9 OLES 2026 Crossword Puzzle

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Across
  1. 2. Liquid waste from homes and industries (9 letters)
  2. 3. Process of water changing from liquid to gas (11 letters)
  3. 7. Excessive nutrients that cause algae growth in water (10 letters)
  4. 12. Reduction in water usage (10 letters)
  5. 16. Drinking water that is safe for humans (4 letters)
  6. 18. Acid rain caused by air pollution (4 letters)
  7. 19. Process of water soaking into the ground (11 letters)
  8. 21. Protective layer around Earth's water (11 letters)
  9. 23. Water that runs off land into rivers and streams (7 letters)
  10. 24. Wetland that filters and cleans water (5 letters)
  11. 25. Oil spill or chemical leak into water (9 letters)
  12. 26. Purification method using sand and gravel (10 letters)
Down
  1. 1. Cycle that describes water movement on Earth (5 letters)
  2. 4. Harmful chemicals used to kill insects on crops (10 letters)
  3. 5. Freshwater stored in ice sheets and glaciers (3 letters)
  4. 6. Treatment facility that cleans wastewater (4 letters)
  5. 8. Bacteria and viruses that contaminate water (8 letters)
  6. 9. Rain or snow that falls to Earth (10 letters)
  7. 10. Contamination of water with harmful substances (9 letters)
  8. 11. Heavy metals that pollute water sources (5 letters)
  9. 13. Pipes that carry wastewater away from homes (5 letters)
  10. 14. Reuse of water for multiple purposes (7 letters)
  11. 15. Underground layer of rock that holds water (9 letters)
  12. 17. Farming practice that reduces water runoff (7 letters)
  13. 20. Salty water that covers most of Earth (5 letters)
  14. 22. Organism that indicates water quality (12 letters)