Biogeochemical Cycles
A commonly cited example is the water cycle. In Earth science, a biogeochemical cycle or substance turnover or cycling of substances is a pathway by which a chemical substance moves through both biotic (biosphere) and abiotic (lithosphere,atmosphere, and hydrosphere) compartments of Earth. A cycle is a series of change which comes back to the starting point and which can be repeated. The term "biogeochemical" tells us that biological, geological and chemical factors are all involved. The circulation of chemical nutrients like carbon, oxygen, nitrogen, phosphorus, calcium, and water etc. through the biological and physical world are known as biogeochemical cycles. In effect, the element is recycled, although in some cycles there may be places (called reservoirs) where the element is accumulated or held for a long period of time (such as an ocean or lake for water).Water, for example, is always recycled through the water cycle, as shown in the diagram. The water undergoes evaporation, condensation, and precipitation, falling back to Earth clean and fresh. Elements, chemical compounds, and other forms of matter are passed from one organism to another and from one part of the biosphere to another through biogeochemical cycles.
From Wikipedia, the free encyclopedia
From Wikipedia, the free encyclopedia
Biogeochemical Cycles Chapters - Read each chapter and write a summary for each and submit it to: [email protected]
Level 6 - Guiding Question: What is the driving force for all these cycles?
Observe and record daily changes. Check the temperature of the column. Look for evidence of the succession of decay organisms. Observe the odor at each air hole. Periodically recycle any water the drains into the bottom of the column and /or add more water to keep the material moist. Oxygen and moisture are both necessary to promote aerobic decomposition.
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I have a great respect for incremental improvement, and I've done that sort of thing in my life, but I've always been attracted to the more revolutionary changes. I don't know why. Because they're harder. They're much more stressful emotionally. And you usually go through a period where everybody tells you that you've completely failed.
Steve Jobs
Level 6 - Investigation: Read the lab carefully, print it out if you need to by pressing the print button. Record all your data in the google form below answer the questions and press the submit button.
Level 6 - Video: After watching the Video on BioGeochemical cycling post your thoughts on the class blog answering the following question:
how are nutrients and energy connected and what is CHNOPS and what cycle (s) reuse them?
Level 6 - Elaborations: Make up assignment for Slews day. Must be made up before the next SLEWS Day Wednesday March 12th. You can do the Native Plant collections at the following sites: School Farm, UC Davis Arboretum, Ferns Park, Cache Creek Nature Preserve. You must collect at least 10 samples (worth 5 points each) for a total of 50 achievements. They must pressed, dried, mounted and labeled all the method and techniques are outlined in the directions below. California Native Plant Society website (https://www.cnps.org/) is very helpful as is the Calflora.org site make sure you log in as a student otherwise the site will try to charge you, students are free.
Level 6 - Review: click on the VDOs to review the Nitrogen and Carbon Cycles.
Nitrogen Cycle Review
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Carbon Cycle Review
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Level 6 - Summary: The Unit Test
Nitrogen Cycle Quiz
Unit Summary Test: Geobiochemical Cycles 40 achievements
Don't judge each day by the harvest you reap but by the seeds that you plant.
Robert Louis Stevenson