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Iron Story

Iron Story. Lesson Plan Trial and Evaluation Julie Ribar. Overview of the Iron Story. The amount of carbon dioxide in the atmosphere has increased significantly over the past 150 years CO2 traps IR radiation, which increases the earth’s temperature.

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Iron Story

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  1. Iron Story Lesson Plan Trial and Evaluation Julie Ribar

  2. Overview of the Iron Story • The amount of carbon dioxide in the atmosphere has increased significantly over the past 150 years • CO2 traps IR radiation, which increases the earth’s temperature. • It is thought that atmospheric CO2 levels have increased drastically in recent years due to an increase in fossil fuel consumption.

  3. Primary Production/Diatom Formation Addition of Fe and Si Atmospheric CO2 Air Temperature Global Warming Oceanic CO2 Overview of the Iron Story • The Biological Pump moves CO2 from the atmosphere to the ocean. • So in theory, increasing primary production will increase the rates at which carbon is sequestered • It is thought that iron fertilization on a wide scale may decrease the rate of global warming.

  4. The Objectives and Goals of the Iron Story Lesson Plan • It has been theorized that iron and silicon are limiting factors in primary production. • This lesson plan assesses if increasing levels of iron and increase primary production. • Objectives: To provide students with the fundamental theory of the biological pump and its limiting factors • To allow student to follows a group of scientists on an iron fertilization expedition. • To analyze data to assess if increases in oceanic iron concentrations increases primary production.

  5. Testing the Iron Story • Two groups of students selected at the university level. • Modifications: Worksheet packets created. Easier lesson provided background information on the carbon cycle, upwelling and the “biological pump”. • George Matsumoto was kind enough to post these lessons online. • Both groups completed their lesson in about 1 hour.

  6. What are the strengths of this topic/lesson? • Plenty of interdisciplinary connections can be made. • Can be used in conjunction with the bridge activity “Hold the Anchovy”. • Supports the use of technology, however not dependent. • Creatively and intellectually challenges students. • Correlates with state and national standards.

  7. What are the weaknesses of this topic/lesson? • The one hour format I used to present this lesson didn’t give the students enough time to absorb the information. It would have been better to spread the lessons during the course of a week. • The students unanimously stated that the SOFeX website was too wordy, complex, and difficult to navigate.

  8. What modifications are needed to improve this topic/lesson? • Modify the SOFeX website. • Simplify Excel speardsheet. • List additional extension activities.

  9. Extensions • List or have links to other extension activities such as photosynthesis labs (my original group already created a few extension activities), • Other extension topics: oceanic food chains, thermoclines, upwelling, El Niño , the carbon cycle, green house gases, global warming, seawater chemistry, growth of corals, harmful algae blooms, ocean temperatures, ice cores, tree ring growth, Bridge’s “Hold the Anchovy”, etc.) • Extension: position paper. Topic: Is global warming due natural climatic fluctuations or to an increased consumption of fossil fuels. State evidence to support your view. • Group discussion: Investigate the possible negative effects of activating the “biological pump” (John Martin’s Iron Theory)

  10. Iron Story links • http://www.mbari.org/education/EARTH/ • http://www.mbari.org/expeditions/SOFeX2002/history&purpose.htm • Bridge activity “hold the anchovy” http://www.vims.edu/bridge/anchovy.html • http://images.google.com/imgres?imgurl=http://ublib.buffalo.edu/libraries/projects/cases/iron_case/waves19.jpg&imgrefurl=http://ublib.buffalo.edu/libraries/projects/cases/iron_case/geritol.html&h=296&w=400&sz=58&tbnid=G4HcZpAHGVkJ:&tbnh=88&tbnw=118&start=7&prev=/images%3Fq%3DIron%2BFertilization%26hl%3Den%26lr%3D%26ie%3DUTF-8

  11. Other MBARI Links • http://oceanexplorer.noaa.gov/ • http://www.uncw.edu/aquarius/ • http://www.reefcheck.org/ • http://www.nationalgeographic.com/features/seas/index.html • http://www.toppcensus.org/index.cgi?flash=1 • http://www.thecoolroom.org/ • http://www.vims.edu/adv/ed/teach.html • http://www.hboi.edu/index_02.html • http://www.mbl.edu/ • http://woodshole.com/science.htm

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