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Tuesday February 12, 2013

Tuesday February 12, 2013. ( Introduction to Oceanography; Salinity; Video – Oceans Part1 ). The Launch Pad Tuesday, 2/12/13. Complete the following sentence: We know more about the surface of the planet Mars than we know about ___________________. what’s in our own oceans. Announcements.

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Tuesday February 12, 2013

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  1. TuesdayFebruary 12, 2013 (Introduction to Oceanography; Salinity; Video – Oceans Part1)

  2. The Launch Pad Tuesday, 2/12/13 • Complete the following sentence: • We know more about the surface of the planet Mars than we know about ___________________. • what’s in our own oceans

  3. Announcements Happy Birthday to President Lincoln!

  4. Announcements I will be available after school from 4:45 until 5:15.

  5. Recent Events in Science LDCM Launched The Landsat Data Continuity Mission (LDCM) spacecraft is in orbit following a picture-perfect launch aboard a United Launch Alliance Atlas V rocket yesterday. The Atlas V booster performed normally and the Centaur upper stage engine ignited as planned. The payload fairing that protected LDCM during the first part of ascent separated on time and fell away, revealing the spacecraft. The Centaur's engine shut down to begin a 55-minute coast phase before it reignited to put LDCM into its orbit above Earth. The Landsat Data Continuity Mission (LDCM), a collaboration between NASA and the U.S. Geological Survey, will provide moderate-resolution (15 m–100 m, depending on spectral frequency) measurements of the Earth's terrestrial and polar regions in the visible, near-infrared, short wave infrared, and thermal infrared. LDCM will provide continuity with the 38-year long Landsat land imaging data set. In addition to widespread routine use for land use planning and monitoring on regional to local scales, support of disaster response and evaluations, and water use monitoring, LDCM measurements directly serve NASA research in the focus areas of climate, carbon cycle, ecosystems, water cycle, biogeochemistry, and Earth surface/interior. Read All About It! www.nasa.gov/mission_pages/landsat/main/index.html

  6. Oceanography

  7. Oceanography in the sense that we will study it should probably be titled “The Hydrosphere”, because we will also study fresh water.

  8. The Composition of Seawater Seawater consists of about 3.5% (by weight) dissolved minerals. Salinity refers to the total amount of solid material dissolved in water. Salinity is typically expressed in parts per thousand (‰) The average salinity of seawater is 35‰, with the major constituent being sodium chloride

  9. The Composition of Seawater Sources of Sea Salts chemical weathering of rocks on the continents and subsequent inflow from rivers outgassing from volcanic eruptions

  10. The Composition of Seawater Processes Affecting Seawater Salinity Variations in salinity are a consequence of changes in the water content of the solution. Processes that decrease salinity (add water) include: precipitation runoff from land icebergs melting sea ice melting

  11. The Composition of Seawater Processes Affecting Seawater Salinity Variations in salinity are a consequence of changes in the water content of the solution. Processes that increase salinity (remove water) include: evaporation formation of sea ice

  12. The Composition of Seawater Surface salinity in the open ocean ranges from 33‰ to 38‰.

  13. Processes Affecting Seawater Salinity decrease seawater salinity increase seawater salinity

  14. A desalination plant that removes salts and other chemicals from sea water to produce fresh water.

  15. Video DisneyNature Oceans (Part 1)

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