Science Crossword Puzzle

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Across
  1. 2. The gas filled in electric bulb
  2. 4. positive electrode
  3. 5. latin name of gold
  4. 6. Interaction between living and non- living
  5. 8. person who studies physics
  6. 9. portion of the brain concerned with intelligence
Down
  1. 1. science of sound
  2. 2. Farming of useful aquatic animals
  3. 3. fruit develops from
  4. 7. king of acids