Across
- 5. Study of the mind and behavior
- 6. Process of gradual change over time
- 7. System Sun and all the celestial objects orbiting around it
- 10. Physicist known for the theory of relativity
- 12. Genetic material that carries hereditary information
- 13. Force that attracts objects toward each other
- 14. Famous playwright and poet
- 16. Global computer network connecting millions of devices
- 17. Mountain that erupts with lava and ash
- 18. Third planet from the Sun
Down
- 1. Sculpture representing a person or object
- 2. Earth's natural satellite
- 3. Process by which plants convert sunlight into energy
- 4. Influential classical composer
- 8. Period of cultural and artistic rebirth in Europe
- 9. French military and political leader
- 11. Essential gas for human respiration
- 15. System of government by the people