Psychology

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Across
  1. 3. The most spoken language in the world
  2. 4. The author of the play Orthello?
  3. 8. The empire that was ruled by Julius Caesar
  4. 10. The acronym for this is WWW
  5. 12. The process by which plants transform carbon dioxide into oxygen
  6. 13. The element with the chemical symbol 'Fe'
  7. 14. Planet that is closest to the sun
Down
  1. 1. The largest species of shark
  2. 2. The artist that cut his ear off
  3. 5. Painter who created the 'Mona Lisa' painting
  4. 6. The currency in Japan
  5. 7. The longest river in the world
  6. 9. The only metal that is liquid at room temperature
  7. 11. The number of chambers the heart has