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