Across
- 1. King Arthur's legendary sword
- 8. A type of energy that comes from the sun
- 11. The study of celestial bodies and the universe
- 13. The process by which plants make their own food
- 14. Basic unit of life
- 15. Famous playwright of Romeo and Juliet
- 17. A famous scientist who formulated the theory of relativity
- 19. The capital of Japan
- 20. Small, buzzing insect that produces honey
Down
- 2. A reptile known for changing color to match its surroundings
- 3. Fastest land animal
- 4. The force that pulls objects toward the center of the Earth
- 5. Earth's natural satellite
- 6. System of government by the people
- 7. A planet known as the Red Planet
- 9. A shape with eight sides
- 10. Cold, frozen water
- 12. Largest mammal on Earth
- 16. Capital of France
- 18. An element with the symbol "Fe"