Carbon Cycle Links:

NASA: Earth Observatory

http://earthobservatory.nasa.gov/Library/CarbonCycle/carbon_cycle4.html

NOAA (National Oceanographic and Atmospheric Administration)

http://www.magazine.noaa.gov/stories/mag97.htm

Australian government

http://www.bom.gov.au/info/climate/change/gallery/9.shtml

Carbon cycle diagram

http://shiftingbaselines.org/blog/images/carbon_cycle.jpeg

Nitrogen Cycle Links:

NASA:

http://soil.gsfc.nasa.gov/NFTG/nitrocyc.htm

USGS (United States Geological Survey) Nitrogen Cycle Diagram

http://water.usgs.gov/nrp/proj.bib/microbiology/link_nitrogencycle.html

USDA (United States Department of Agriculture Nitrogen Cycle diagram (scroll down through web page to get to diagram)

http://www.ers.usda.gov/AmberWaves/September05/Features/ImprovingAirandWater.htm

The Rock Cycle

NASA Rock Cycle/Geology

http://rst.gsfc.nasa.gov/Sect2/Sect2_1a.html

Frederick County Public Schools Rock Cycle Diagram

http://teach.fcps.net/trt20/projects/EKU/Rocks/rock_cycle_1.htm

USGS (United States Geological Survey) Rock Cycle Diagram
http://www.cr.usgs.gov/rtr/2004/2004ppt/slide4.htm

NPS (United States National Park Service)

http://www.nps.gov/archive/yose/education/glance/geology/sierra_up.htm

United States Department of Agriculture

http://www.nj.nrcs.usda.gov/partnerships/envirothon/soils/geology.html

Water Cycle

NASA Water Cycle

http://science.hq.nasa.gov/oceans/system/water.html

USGS (United States Geological Survey) Water Cycle

http://ga.water.usgs.gov/edu/watercyclehi.html

NOAA (National Oceanographic and Atmospheric Administration) Water Cycle

http://www.nwrfc.noaa.gov/info/water_cycle/hydrology.cgi

United States Global Change Research Program

http://www.usgcrp.gov/usgcrp/images/ocp2003/ocpfy2003-fig5-1.htm

Recycling

United States Department of Energy

http://www.eia.doe.gov/kids/energyfacts/saving/recycling/solidwaste/paperandglass.html

MDE (Maryland Department of the Environment)

http://www.mde.state.md.us/Programs/LandPrograms/Recycling/md_recycling/index.asp

Maryland Recycling Info.

http://www.mde.state.md.us/Programs/LandPrograms/Recycling/Local/recylingrates.asp