Across
- 1. alkaloid found in coffee
- 4. a programming language
- 5. opposes
- 6. green pigment
- 7. force
- 9. heat
- 12. 6×4
- 14. plants breathe
- 15. vinegar
- 20. phenomenon
Down
- 2. wrapping
- 3. isotones
- 8. radioactive element
- 10. solvent
- 11. once lost
- 13. smallest
- 16. someone call _police
- 17. los Angeles hasclimate
- 18. Ethene
- 19. a push or pull