Across
- 2. bird's mouth
- 3. extremely hot, similar to burning
- 5. animals that have hair and produce milk for their young
- 9. thin, pointed nails of a bird or animal
- 12. an animal that hunts other animals for food
- 14. active at night
- 15. spine
- 18. a small rigid plate that grows out of the skin of a fish or reptile
- 19. short period of extremely hot weather in otherwise moderate summer
- 20. animals who can both live in water and on land
- 21. coming from nature and is available to use again and again
Down
- 1. sth that lasts only for a limited time
- 4. a gas that we breathe out (2 words)
- 6. chemicals that are used to kill pests
- 7. happening step by step
- 8. animals without the backbone
- 10. synonym of forecast
- 11. a form of marine life having a crust-like shell
- 12. illegal hunter
- 13. waste garbage that consists of chemicals (2 words)
- 16. a bad sign
- 17. slightly wet