Crossword Puzzle

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Across
  1. 4. A device that projects an image through a small hole
  2. 7. A famous drink that originated in Mocha, Yemen
  3. 8. A scientific academy and library in Baghdad
Down
  1. 1. A method to purify liquids by heating and cooling
  2. 2. The study of human societies and economies
  3. 3. The science of breaking secret codes
  4. 5. The field of math that Al-Khwarizmi helped develop
  5. 6. The curved structure used in mosques and Gothic cathedrals