Crossword 1

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Across
  1. 4. Using objects to signify ideas
  2. 6. A type of rock formed from volcanic activity
  3. 9. A device used to detect an earthquake
  4. 10. A branch of physics dealing with sound
  5. 11. A large complex molecule essential for life
Down
  1. 1. A famous painting by Claude Monet
  2. 2. A chemical element with the symbol 'Na'
  3. 3. Largest bird by height
  4. 5. A famous inventor of the telephone
  5. 7. A famous painting by Vincent Van Gogh
  6. 8. A large flightless bird from Australia