Home›Biogeochemical Cycles›All Biogeochemical CyclesBrowse ByAll Biogeochemical CyclesFactsAll Biogeochemical CyclesSourcesComments (0)Reader Challenges (0)FactsComparisonPrimary TimescaleWell-attestedMulti-Year to Decadal 1Primary TimescaleWell-attestedGeological (Deep Time) 1All Biogeochemical CyclesFilter Results9 entriesdemonstratesAllFreshwater (1)Seagrass Meadow (1)Temperate Rainforest (1)Wetlands (2)ScaleAllAtmosphere is 21 percent oxygen, roughly 3.4x10^19 mol of O2 (1)BrowseCompareSelect all 9Calcium CycleBiogeochemical CyclesCarbon CycleBiogeochemical CyclesIron CycleBiogeochemical CyclesMercury CycleBiogeochemical CyclesNitrogen CycleBiogeochemical CyclesOxygen CycleBiogeochemical CyclesPhosphorus CycleBiogeochemical CyclesSulfur CycleBiogeochemical CyclesWater CycleBiogeochemical CyclesSources1. Wikipedia: Biogeochemical cycletier 2WikipediaBiogeochemical cycle, Fast and slow cycles section, fast-cycle sentenceFast or biological cycles can complete within years, moving substances from atmosphere to biosphere, then back to the atmosphere.Biogeochemical cycle, Fast and slow cycles section, slow-cycle sentenceSlow or geological cycles can take millions of years to complete, moving substances through the Earth's crust between rocks, soil, ocean and atmosphere.View the SourceComments (0)No comments yet. Be the first to share a thought.Sign in to join the discussion.Reader Challenges (0)No disputes yet. Spotted an error or a better source? Open the first one.Sign in to dispute this or suggest a correction.