Across
- 2. Astronomer who proposed that the Sun is the center of the solar system
- 4. Scientist who formulated the laws of motion and gravity
- 7. Greek city-state famous for its military culture
- 8. China's "Yellow River" and cradle of early Chinese civilization
- 11. Inventor of the movable-type printing press in Europe
- 12. Renaissance artist who painted the Mona Lisa
- 14. Theory stating that the Sun is at the center of the solar system
- 15. Capital city of the ancient empire that dominated the Mediterranean
Down
- 1. Ancient civilization located between the Tigris and Euphrates Rivers
- 3. Explorer who reached the Americas in 1492
- 5. Ancient civilization built along the Nile River
- 6. Italian city considered the birthplace of the Renaissance
- 9. Greek city-state known as the birthplace of democracy
- 10. Scientist who used a telescope to support heliocentric theory
- 13. River valley where one of the world's earliest civilizations developed