Across
- 2. an alloy that contains copper and zinc
- 3. temperature Haber process is carried out at
- 5. water that is safe to drink
- 9. treatment of seawater to remove sodium chloride
- 11. product of the Haber process
- 14. largest users of water
- 15. a condition required for rusting
- 16. a resource that will run out
- 17. using bacteria to extract metals
- 19. coating a metal object with another metal, by electrolysis
- 21. meets the needs of current generations without compromising future generations ability to meet own needs
- 22. a type of polymer that melts when heated
- 23. make thermosetting polymers resistant to heating, because of these in between polymer chains
- 24. reactant of the Haber process
Down
- 1. phosphate rock cannot be used directly as a fertiliser because it is...
- 4. made of two materials, a matrix and reinforcement e.g. wood
- 6. the forward reaction of the Haber process is...
- 7. where a more reactive metal displaces a less reactive metal from a compound
- 8. this type of digestion occurs in sewage sludge
- 10. separation where solid particles drop to the bottom of a container
- 11. mixture of two or more metals (and sometimes non metals)
- 12. a natural deposit containing potassium, used to make fertilisers
- 13. assesses environmental impact of a product for it's entire lifetime
- 18. extracting metals using plants
- 20. loss of electrons