Across
- 4. water vapor turns into a liquid
- 10. organisms breaking molecules for ATP
- 11. soil bacteria convert nitrogen compounds
- 14. gas being converted to compounds
- 16. dead organisms are decomposed
- 17. divided into different layers
- 21. makes up 78% of the atmosphere
Down
- 1. fuels contain large amounts of carbon
- 2. an organism eats another
- 3. movement of carbon from atmosphere
- 5. an animal that doesn't harm another
- 6. 2 animals with similar lifestyles
- 7. all food chains possible in an atmosphere
- 8. cycle movement of nitrogen from atmosphere
- 9. the different layers in an energy pyramid
- 12. plants absorb the nitrogen compounds
- 13. first stage in the water cycle
- 15. water comes down to the earth by falling
- 18. carbon dioxide and sugar to glucose
- 19. movement of oxygen from atmosphere
- 20. passing of energy between organisms