1. Sulfur Biochemical Cycle By: Andrew Cerrina Ray-Ray Chi Jo-Hannnah Chong Mambok Lee

2. Where Sulfur is Found on Earth…

3. KEY TERMS SO 2 : Sulfur Dioxide Gas H 2 S : Hydrogen Sulfide Gas SO 4 : Sulfate Compound

4. Source Sulfur originates in the Earth’s lithosphere

5. Sulfur Dioxide Less than 1% of atmosphere Found in atmosphere from volcanoes and industrial activity Compounds fall or are rained out of atmosphere Plants take in forms of this compound and absorb into tissues

6. After plants die or are consumed by animals, organic sulfur compounds are returned to land or water

8. Bacteria Can transform organic sulfur to hydrogen sulfide gas

9. Oceans Some phytoplankton produce chemicals that transform to SO 2 Gases produced re-enter the atmosphere, water, soil Continues cycle

10. Lifetime Very short Used up in days

11. Biological and Ecological Effects Sulfur is a vital ingredient to proteins Plants take sulfur compounds out of water Some animals are dependent on plants that absorb sulfur

12. If too much sulfur is found in the air, possibility of acid rain!!!!!!

13. Carbon, the key elemefe on earth, has a complicated biogeochemical cycle of great

15. Works Cited http://essp.csumb.edu/esse/climate/climate biogeo.html www.geo.uu.nl/Research/Geochemistry/ja ck/SCycle.ppt filebox.vt.edu/users/chagedor/biol_4684/C ycles/Scycle.html