Sulfur cycle

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Environmental Science, Group 1 presentation \m/

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Sulfur cycle

  1. 1. II-Adelfa Group 1 Presentation<br />Sulfur Cycle<br />
  2. 2. What is sulfur?<br /> Sulfur is the 10th most abundant element in the environment, with atomic number 16. It is a bright yellow crystalline solid in its normal state, with most of it stored underground in rocks and minerals and in ocean floor deposits. <br /> Sulfur is used for fertilizers, gunpowder, matches, and in insecticides and fungicides. It is a part of vitamins, proteins and hormones that are considered critical to climate and health of various ecosystems.<br />
  3. 3. Sulfur Cycle<br />
  4. 4. Steps of Sulfur Cycle<br />The cycle begins with the weathering of rocks, which releases stored sulfur.<br />Sulfur comes into contact with the air, converting it to sulfate (SO4).<br />Sulfate is taken up by plants and microorganisms and is changed to organic form.<br />Sulfur moves up the food chain.<br />When organisms die, some of the sulfur is released back to sulfate and enter microorganisms.<br />
  5. 5. Steps of Sulfur Cycle<br />Natural sources emit sulfur into the air.<br />Sulfur eventually settles back to the Earth or comes through rainfall, with some also going to the ocean. <br />Sulfur is also drained to rivers and lakes, eventually to the oceans.<br />Some of the sulfur from oceans go back to the atmosphere through the sea spray.<br />Remaining sulfur go to ocean floor and form ferrous sulfide, which is responsible for the black color of most marine sediments.<br />
  6. 6. Effects of Sulfur Cycle on Nature<br />Sulfur is one of the processes that allow natural weathering and other natural processes.<br />Sulfur Cycle does not allow acid rains because it regulates the amount of sulfur present in the atmosphere, hydrosphere, and lithosphere.<br />Sulfuric acid forms sulfuric acid smog when it mixes with water vapor.<br />
  7. 7. Effects of Human Progress on the Sulfur Cycle<br />Human activities since the start of the Industrial Revolution contributed to most of the sulfur that enters the atmosphere. One-third of all sulfur that reaches the atmosphere comes from human activities.<br />Emissions from human activities react to produce sulfate salts that create acid rain.<br />Sulfur dioxide aerosols absorb ultraviolet rays, which cools areas and offsets global warming caused by greenhouse effect.<br />
  8. 8. Sources<br />Environmental Literacy Council, http://www.enviroliteracy.org<br />Carnegie Mellon University Environmental Decision Making, http://telstar.ote.cmu.edu<br />Wikipedia, http://en.wikipedia.org/wiki/Sulfur<br />
  9. 9. Group Members<br />Chino Bandonil<br />Franco Cañal<br />Ronilo del Rosario<br />Jherico Torres<br />NinsDajac<br />

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