Across
- 3. Art movement focused on light and color
- 9. Ancient citadel in Athens
- 10. Composer of the "Moonlight Sonata"
- 13. Ancient Egyptian writing system
- 16. Tree that doesn't lose leaves seasonally
- 18. Ill-fated ship that sank in 1912
- 23. Imaginary line around the middle of Earth
- 25. Physicist known for theory of relativity
- 27. Temperature scale named after Swedish astronomer
- 29. Large wave caused by seismic activity
- 30. Element used in old thermometers
- 31. Largest hot desert in the world
- 32. Musical instrument with 88 keys
- 34. Communication system using dots and dashes
- 37. System of government by the people
- 39. Digital cryptocurrency
- 41. Artist of the Mona Lisa
- 44. Snow mass rushing down a mountainside
- 45. Long-distance running event
- 49. Longest river in South America
- 50. Second planet from the Sun
Down
- 1. Preserved remains of ancient life
- 2. Process by which plants make food
- 4. Largest land mammal
- 5. Tiny marine animals that build reefs
- 6. Japanese dish often involving raw fish
- 7. Period of cultural rebirth in Europe
- 8. Economic increase in prices over time
- 11. Process of converting waste into reusable material
- 12. Ancient amphitheater in Rome
- 14. Element essential for breathing
- 15. English playwright and poet
- 17. Seat of Russian government
- 19. Famous mausoleum in India
- 20. Highest mountain in the world
- 21. Substance to stimulate immunity
- 22. Hormone that regulates blood sugar
- 24. Period of cultural rebirth in Europe
- 26. Ancient Egyptian tomb structure
- 28. Indian independence leader
- 33. Classical dance form
- 35. Japanese art of paper folding
- 36. Complete set of an organism's DNA
- 38. Egg-laying mammal with a duck-like bill
- 40. Scientist who proposed theory of evolution
- 42. Ancient supercontinent
- 43. French emperor and military leader
- 46. Epic poem attributed to Homer
- 47. Fundamental particle in physics
- 48. Capital of France