Across
- 1. unprotected from the wind
- 4. active during the day
- 7. best, most favorable
- 8. a difficult act or achievement
- 9. a person who watches something
- 11. movement from one place to another
- 12. one half of the Earth; one half of a sphere
- 14. a priority, an urgent need
- 16. active at night
- 18. type; a basic group in biological classification
- 20. to reproduce
Down
- 2. finding and following one's route
- 3. to interest greatly
- 5. to provide energy
- 6. to live in
- 10. to develop and change
- 13. to leave the correct route; to become separated from the group
- 15. to live under difficult conditions
- 17. to make difficult to see
- 19. a part or feature