Puzzle 2: Atmosphere, Environment, Water Treatment, Materials & Haber Process

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Across
  1. 2. The process of coating iron with zinc to prevent rusting is called __________
  2. 4. The catalyst used in the Haber process is __________
  3. 7. The term for water that is safe to drink but not pure because it contains dissolved minerals is __________ water
  4. 9. The total greenhouse gas emissions caused by an activity or product over its lifecycle is called its carbon __________
  5. 11. The alloy of copper and zinc is __________
  6. 14. The tough layer of aluminium __________ that prevents further corrosion of aluminium is Al₂O₃
  7. 15. The industrial process that produces ammonia from nitrogen and hydrogen is the __________ process
  8. 19. The greenhouse gas more potent than carbon dioxide that is produced by livestock is __________
  9. 20. The type of polymer that softens when heated and can be remoulded is called __________
  10. 21. The environmental problem caused by sulfur dioxide and nitrogen oxides is acid __________
  11. 22. The water treatment step that kills bacteria using chlorine is called __________
  12. 23. The alloy of copper and tin is __________
  13. 25. The type of fertiliser that contains nitrogen phosphorus and potassium is abbreviated as __________
  14. 27. The type of converter fitted to car exhausts that turns CO and NOₓ into CO₂ and N₂ is a __________ converter
  15. 28. The name for hydrated iron(III) oxide formed when iron corrodes is __________
  16. 29. The first step in sewage treatment that removes large solids is called __________
  17. 30. A material made from two or more different materials such as fibre glass is called a __________
  18. 31. The energy-intensive method to desalinate seawater by boiling and condensing is __________
  19. 34. The temperature in degrees Celsius used as a compromise in the Haber process is __________
Down
  1. 1. The process that increased atmospheric oxygen and decreased carbon dioxide is __________
  2. 3. The type of protection where a more reactive metal like zinc corrodes instead of iron is called __________ protection
  3. 5. The type of polymer with crosslinks that does not soften when heated is called __________
  4. 6. A mixture of a metal with another element such as carbon is called an __________
  5. 8. The type of digestion where bacteria break down organic matter in sewage using oxygen is __________ digestion
  6. 10. The term for what happens to unreacted nitrogen and hydrogen gases in the Haber process is that they are __________
  7. 12. The effect where gases such as carbon dioxide and methane trap heat in the atmosphere is called the __________ effect
  8. 13. The process that formed oceans as Earth cooled from water vapour is __________
  9. 16. The direction of the forward reaction N₂ + 3H₂ → 2NH₃ in the Haber process is __________
  10. 17. The sewage treatment step where solids sink to form sludge is __________
  11. 18. The type of steel containing chromium and nickel that resists corrosion is __________ steel
  12. 24. The alloy of iron and carbon is __________
  13. 26. The type of reaction shown by the equation N₂ + 3H₂ ⇌ 2NH₃ is __________
  14. 32. The fertiliser made by reacting ammonia with nitric acid NH₃ + HNO₃ → is __________
  15. 33. The pressure in atmospheres used as a compromise in the Haber process is __________