Across
- 5. A symbol representing an idea
- 11. A treeless Arctic region
- 12. Preserved remains of an ancient organism
- 13. A common crystal used in watches
- 14. When the sun or moon is obscured
- 17. A deep valley with steep sides
- 18. Art made of small pieces of stone or glass
- 19. Where the earth and sky meet
- 20. Moral excellence
Down
- 1. A code or secret writing
- 2. A collection of stars, planets, and space matter
- 3. The top of a mountain
- 4. A green spot in a desert
- 6. A classical dance form
- 7. A dense tropical forest
- 8. A vertical structure for support
- 9. A prophet or wise advisor
- 10. A whirlpool or whirlwind
- 15. An Egyptian wonder
- 16. A ship's stopping device