i

Across

4. Krebscycle
7. Biosphere
9. Photosynthesis
11. Atmosphere
13. Darkreactions
14. Product
16. Mitochondria
17. Autotroph
18. Decomposer
20. Chlorophy

Down

1. Phosphorus
2. Geosphere
3. Glycolysis
5. Fermentation
6. Hydrosphere
8. Matter
10. Heterotroph
12. Reactant
15. Nitrogen
19. Carbon