Biogeochemical Cycles• Water Cycle (hydrological)– How water is transferred from the atmosphere to earth,
through organisms and back to the atmosphere• Carbon Cycle– How carbon dioxide and oxygen are cycled from the
atmosphere through organisms and back to the atmosphere.
• Nitrogen Cycle– How organisms convert (fix) unusable nitrogen in the
atmosphere to usable nitrogen to make proteins
Water Cycle TERMS–Precipitation– Transpiration– Evaporation– Infiltration(seepage)–Ground Water–Run Off–Condensationhttp://www.nwlg.org/pages/resources/geog/hydro_cycle/hydro/cycle.htm
http://techalive.mtu.edu/meec/module01/HydrologicCycleQuiz.htm
Nitrogen Cycle1. All organisms need Nitrogen to build proteins and for growth. Our atmosphere is made up of what % of Nitrogen?2. 78% of the atmosphere is Nitrogen, but organisms cannot use it. The nitrogen needs to be changed (or “fixed”) into a useable form (ammonia)
3. Nitrogen fixing bacteria, on the roots of plants, (Legume or bean plants like peanuts, soy) change the nitrogen to a usable form (ammonia/nitrates)4.Animals then eat the plants/plant eaters to get the needed nitrogen
Nitrogen Cycle Terms
Decomposition – when dead organisms break down and release nitrogen into the soil
Detritivores – organisms that break down dead material (earthworms, fungus)
Nitrogen Fixation – when bacteria in soil changes nitrogen to a useable formLegumes – bean plants whose roots have nitrogen fixing bacteriaAmmonia – a useable form of nitrogen
Carbon CycleTERMS
CARBON ‘SINKS’ (STORES Carbon)
Or
CARBON ‘SOURCES’ (ADDS Carbon to our atmosphere)
??• Respiration.........• Photosynthesis…• Combustion………• Decomposition…. • Fossil Fuels……….
SOURCE
SINK
SOURCE
SOURCE
SOURCE when Burned, SINK when stored in the ground