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Download Hydrologic (Water) Cycle
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nutritentcycles.notebook March 06, 2014 Hydrologic (Water) Cycle: -Its the circular pathway of water on Earth, constantly recycles itself * * * * precipitation- snow, sleet, rain, hail evaporation- liquid to gas condensation- gas to liquid transpiration- loss of water from plant leaves 1 nutritentcycles.notebook March 06, 2014 2 nutritentcycles.notebook March 06, 2014 Oxygen Cycle: -oxygen flows into the atmosphere as a byproduct of photosynthesis -organisms take in the oxygen and release it as carbon dioxide through cellular respiration 3 nutritentcycles.notebook March 06, 2014 Carbon Cycle: Carbon is the building block of life Photosynthesis and cellular respiration account for much of the movement of carbon within the cycle. Carbon can be found in CO2 in the atmosphere, fossil fuels (oil, natural gas, coal), limestone, and dead organic matter in the soil. Speed of the cycle depends on where the carbon is located. fossil fuels - slow cycle plants - fast cycle 4 nutritentcycles.notebook March 06, 2014 5 nutritentcycles.notebook March 06, 2014 Nitrogen Cycle: -78% of earth's atmosphere is nitrogen -plants cannot use the nitrogen in the air -most of this cycle takes place underground -Bacteria convert the nitrogen to a usable form Example: beans and peas have nodules on their roots that contain bacteria to help produce nitrogen -When decomposers break down animal excretions, or dead animal/plant matter, nitrogen is returned to the soil. 6 nutritentcycles.notebook March 06, 2014 NitrogenFixation Certain types of bacteria convert gaseous nitrogen into ammonia (NH4) 7 nutritentcycles.notebook March 06, 2014 Phosphorus Cycle: -required for growth and development -2 different length cycles: -Short term: plants gain phosphorus from soil, animals eat plants and when they die, the phosphorus returns to the soil -Long term: phosphates wash into water, incorporate into rock as insoluble compounds -Millions of years later, the rock is exposed, erodes and releases phosphorus -Mining and agricultural runoff also add to the overall amount of phosphorus in the environment -a limiting factor for plant growth, too much will cause excessive algae to grow 8 nutritentcycles.notebook March 06, 2014 Long term cycle Short term cycle 9
