Across
- 2. all of the air on earth
- 3. a gas made of one carbon and two oxygen molecules
- 5. does not require oxygen
- 7. energy carrying molecule made in respiration
- 10. something that is needed for a reaction to occur
- 12. something that is created at the end of a reaction
- 15. all of the water on earth
- 16. the organelle that is the site of photosynthesis
- 18. process where organic matter decays and releases carbon dioxide
- 19. the source of energy for photosynthesis
Down
- 1. requires oxygen
- 4. the process where producers convert light energy to create food
- 6. all of the life on earth
- 8. the organelle that is the site of respiration
- 9. all of the rocks on earth
- 11. the green pigment that absorbs sunlight
- 13. a simple sugar used for energy
- 14. a gas that is released through photosynthesis
- 17. a liquid made of two hydrogen and one oxygen molecules