Across
- 1. A colorless, odorless gass found in air
- 4. Occurs in impure form in charcoal, soot, and coal
- 6. A person or thing that eats something
- 7. The process that uses sunlight, carbon dioxide and water
- 10. The process that combines oxygen with foodstuff molecules
- 13. An organic compound that provides energy for processes in living cells
- 14. A sugary energy source
- 15. A form of electromagnetic radiation
Down
- 2. An organism that decomposes organic material
- 3. An organism that produces organic compounds from simple substances
- 5. The life supporting component of air
- 8. A community of interacting organisms and their physical environment
- 9. Resulting from living things
- 11. Not derived from living organisms
- 12. A colorless liquid that forms oceans, seas and rivers