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Biogeochemical Cycles Water Carbon Nitrogen

Biogeochemical Cycles Water Carbon Nitrogen. 4 ATOMS make up 95% of the body in most organisms. OXYGEN. CARBON. HYDROGEN. NITROGEN. The same molecules are passed around again and again within the biosphere in. BIOGEOCHEMICAL CYCLES. WATER CYCLE = ___________________.

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Biogeochemical Cycles Water Carbon Nitrogen

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  1. Biogeochemical CyclesWater CarbonNitrogen

  2. 4 ATOMS make up 95% of the body in most organisms OXYGEN CARBON HYDROGEN NITROGEN The same molecules are passed around again and again within the biosphere in BIOGEOCHEMICAL CYCLES

  3. WATER CYCLE= ___________________ HYDROLOGIC CYCLE

  4. WHY IS WATER IMPORTANT? Makes up 60-70% of your body Oxygen and Hydrogen are found in all the building blocks of cells carbohydrates, proteins, nucleic acids, lipids Hydrogen in H2O supplies protons (H+) & electrons For photosynthesis.

  5. WATER CYCLE evaporation condensation

  6. The evaporation of water from the surface of plant leaves = TRANSPIRATION The return of water tothe surface in the form of rain, snow, sleet, hail, etc. = PRECIPITATION

  7. WATER CYCLE

  8. CARBON CYCLE CO2 in atmosphere CO2 in ocean

  9. 4 main CARBON reservoirs in BIOSPHERE • In oceans as CO2 gas • In the atmosphere as dissolved CO2 gas • On land in organisms, rocks, soil • Underground as coal & petroleum (fossil fuels) and calcium carbonate in rocks CO2 in atmosphere CO2 in Ocean

  10. Where does CO2 in atmosphere come from? CO2 in atmosphere CO2 in Ocean • Volcanic activity • Human activity (burning fossil fuel) • Cellular respiration • Decomposition of dead organisms

  11. WHY IS CARBON IMPORTANT? Found in all the building blocks of cells:carbohydrates, proteins, nucleic acids, lipids

  12. WHY IS CARBON IMPORTANT? Carbon in CO2 provides the atoms for glucose production during photosynthesis the fuel that all living things depend on.

  13. NITROGEN CYCLE Section 3-3 N2 in Atmosphere NO3- and NO2- NH3

  14. WHY IS NITROGEN IMPORTANT? Nitrogen bases make DNA and RNA Adenine (nitrogen base) is used in ATP. Makes AMINO part of amino acids in (proteins)

  15. 79% of the atmosphere is made up of NITROGEN gas (N2) BUT we Can’t use the nitrogen gas we breathe! The bond in N2 gas is so strong it can only be broken by Lighting, volcanic activity, and a few special bacteria

  16. Bacteria that live in the soil and in symbiotic relationships with plants called legumes, take nitrogen from the atmosphere and turn it into Ammonia, a form that is usable by plants. THIS PROCESS IS CALLED NITROGEN FIXATION

  17. Other bacteria in the soil convert ammonia into which plants can also use. The nitrogen we need for proteins, ATP, and nucleic acids comes from the Food we eat we breathe! NITRATES (NO3- ) and NITRITES (NO2-) Not the air

  18. NITROGEN CYCLE Section 3-3 N2 in Atmosphere NO3- and NO2- NH3 BIOLOGY; Miller and Levine; Prentice Hall; 2006

  19. Bacteria that live in the soil also carry out the reverse process Nitrates/ Nitrates → Nitrogen gas. THIS PROCESS IS CALLED DENITRIFICATION

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