General knowledge crossword

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Across
  1. 4. Kung fu
  2. 5. Famous tennis player ______ Williams
  3. 7. Horizontal rows on periodic table
  4. 10. A lot of Cambridge streets are named after famous
  5. 11. World's largest snake
  6. 14. Tall building
  7. 15. Largest lake in NZ
  8. 18. Shiny grey metal
  9. 19. Tractor fuel
  10. 22. Left-hand side of periodic table
  11. 24. Batman's last name
  12. 25. Nearest river
  13. 27. Da Vinci, Dicaprio
  14. 29. Metal element used in batteries
  15. 31. Japanese train
  16. 34. Richie
  17. 35. Vertical rows on periodic table
  18. 36. Captain Cooks ship
  19. 38. Christopher Nolan movie about space
  20. 40. Hot drink
  21. 41. Orange/brown coating on metal
  22. 44. Hardware store
  23. 46. Atom that has lost or gained electrons
Down
  1. 1. Large rainforest
  2. 2. Negatively charged subatomic particle
  3. 3. Nearby dam
  4. 6. Scottish instrument
  5. 8. Large American bird
  6. 9. H2O
  7. 12. Month that treaty of Waitangi was signed
  8. 13. Scientific name for a dog
  9. 16. Traditional canoe
  10. 17. World's tallest building is in this middle eastern country
  11. 18. Nelson Mandela was from which country (2 words)
  12. 20. The Nile river flows through this country
  13. 21. Number of players on a netball team
  14. 23. Atoms fill their electron shells in order to be
  15. 24. Windy city, beehive
  16. 26. Rugby position that wears number 1
  17. 28. Kiwi who split the atom, Ernest _____
  18. 30. Center of an atom
  19. 32. Capital of England
  20. 33. Where is the Eiffel Tower?
  21. 35. Yellow metal
  22. 37. Large boat for cars and passengers
  23. 39. Ardie _____
  24. 42. Famous opera house is in which city
  25. 43. Black and white bird
  26. 45. How much is a free throw in basketball worth