Across
- 2. a key element of life
- 3. the process of breaking down dead organisms to release organic compounds and CO2
- 6. a form of carbon stored in the atmosphere
- 8. a compressed form of carbon that takes millions of years to form
- 9. a chemical process that creates energy for the body and releases carbon dioxide
- 11. carbon dioxide can ______________ in seawater
- 12. plants use this energy to take carbon dioxide from the air
- 14. a place to hold carbon dioxide in the sky
- 15. an organism that does decomposition
Down
- 1. major building blocks in the body
- 3. fungi and bacteria
- 4. an organism that does photosynthesis
- 5. a process that takes millions of years to convert dead organisms into fuel
- 7. the burning of fossil fuels for energy
- 10. plants use this reaction to take in carbon dioxide and convert it into sugars.
- 13. a form of carbon stored in plants and animals
