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