The Carbon and Oxygen Cycle

4. A form of carbon that is circulated in food chains.
6. Contains dissolved carbon from the atmosphere.
8. A substance that's formed when carbon-based organisms are trapped under layers of sediment.
10. The smallest reservoir of carbon.
12. An area storing large amounts of inorganic or organic carbon.
13. A gas element taken in by producers during photosynthesis or chemosynthesis.
18. The process by which terrestrial and surface aquatic producers create organic carbon.
20. The organisms that turns inorganic carbon to organic.

1. A form of carbon that is unusable to the body.
2. A way for deep sea organisms to produce organic carbon without the use of sunlight.
3. Part of the earth that contains ozone.
5. An organism that receives its energy from consuming other organisms.
7. The largest reservoir of carbon.
9. What is missing from the equation C6H12O6 + O2 → 6Co2 + H2O + _________.
11. A chemical reaction in which substances react very quickly together (usually with oxygen), releasing energy.
14. An oxygen layer that protects earth from radiation and harmful UV rays.
15. A gas element released by producers during photosynthesis or chemosynthesis.
16. Slow decaying organic matter because of a lack of oxygen.
17. A type of fossil fuel extracted from the earth and used to create gasoline.
19. A type of wetland that contains large amounts of organic carbon and low amounts of oxygen.