Across
- 3. Government in which citizens vote
- 5. Official money of a country
- 9. Powerful tropical storm
- 10. Arc of colors formed by sunlight and rain
- 14. Process plants use to make food
- 15. Classical composer from Austria
- 20. Scientist known for the theory of relativity
- 22. Largest hot desert
- 24. System for organizing days and months
- 25. Highest mountain on Earth
- 26. Famous ancient amphitheater in Rome
- 28. Force that attracts objects toward Earth
- 29. Largest planet in the Solar System
Down
- 1. Board game with kings and queens
- 2. Gas humans breathe
- 4. Mountain that erupts lava
- 6. Imaginary line dividing Earth into two hemispheres
- 7. Ancient Egyptian structure
- 8. White marble monument in India
- 11. International multi-sport event
- 12. Molecule carrying genetic information
- 13. English playwright who wrote Hamlet
- 14. Largest ocean
- 16. Instrument used to find direction
- 17. Hardest naturally occurring mineral
- 18. Closest planet to the Sun
- 19. One of the world's longest rivers
- 21. Scientist who formulated the laws of motion
- 23. Smallest unit of an element
- 27. Planet famous for its rings