2. The Chemical Cycles By: Nikko and Lydia

3. The 3 Main Cycles Carbon cycle Nitrogen cycle Phosphorus cycle 2 broad divisions Elements that have a gaseous form Elements that do not have a gaseous form

4. Makes up organic matter Terrestrial Aquatic Cycle is based on C02 Which is a gas Plants use photosynthesis To make Oxygen from C02 Oxygen supports Animals The Carbon Cycle

5. Carbon cycle: Terrestrial Animals use oxygen and return CO2 Carbon: used by producers, consumers, decomposers Cycle quickly in air and water Can be stored in biomass (trees, plants) Carbon in plants under the earth eventually turn into Fossil fuels

6. Carbon Cycle: Aquatic CO2 In aquatic ecosystem can be stored in rocks and sediment Longer Time to release: Weathering Geoligic processes In water Stored as Carbonate or bio carbonate ions Ions keep water "alive" Sun warms the Carbonate and ions,then CO2 is realeased into atmosphere

7. Carbon cycle diagram

8. The Nitrogen Cycle Invovles nitrogen gas Nitrogen fixing Assimilation Ammonification Nitrification Dentrification

9. Nitrogen Fixing One procces of removing nitrogen form the atmosphere Very expensive Uses bacteria to remove the nitrogen gas

10. Assimilation Takes up: Ammonium ion and ntrate ion From soil by plants Animals consume the organic nitrogen in the plants As amino acids, nucleic acids

11. Ammonification Organic nitrogen converting back to ammonium ions Perfomed bacteria and fungal decomposers

12. Nitrification The different conversions of nitrogen in soil Converted into amonium ions Some plants use it Mostly used by aerobic bacteria Bacteria oxidizes the the amonium to nitrite Then to nitrate

13. Dentrification Also by soil bacteria Involves the reduction of nitrogen Some bacteria can get oxygen they need from nitrate

15. Global nitrogen process

16. The Water cycle Has three major processes The sun's energy evaporates water from land and water surfaces As it cools, water vapor condences and falls to earth as precipitation (rain, snow, hail, or sleet) Plants then absorb the fresh water from the soil

17. The Water Cycle (continued) A large amount of water exits plants during transpiration, evaporation from the plant's leaves Water that doesn't enter plantsor absorbed into soil runs off into rivers and streams

18. Water Cycle Diagram

20. Citations harrison, j. a. (2003, March 13). "The Carbon Cycle: What Goes Around Comes Around,". Retrieved May 28, 2010 http://ga.water.usgs.gov/edu/watercyclesummary.html Pidwirny, M. (2006, February 22). The nitrogen cycle. Retrieved May 28, 2010, from Http://www.physicalgeography.net/fundementals/9s.html Http://www.physicalgeography.net/fundementals/9s.html http://www.google.com/imgres?imgurl=http://www.future-of- technology.com/web_images http://www.google.com/imgres?imgurl=http://www.future-of- technology.com/web_images eo.ucar.edu/kids/green/images/carboncycle_sm.jpg www.jointheevolution.ca/.../water-cycle-21.png \\nb_tree\.sdnbcluster_APPS.SERVERS.SERVICES.nbps\apps\BiologyELife (D)\BiologyExploringLife04\0-13-115075-8\text\chapter36\concept36.3.html\\nb_tree\.sdnbcluster_APPS.SERVERS.SERVICES.nbps\apps\BiologyELife http://davis.wpi.edu/dsrg/PROJECTS/raindrop/publication.html