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Wind

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Wind , Wind erosion, Wind transportation, Wind deposition

Wind , Wind erosion, Wind transportation, Wind deposition

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    Wind Wind Presentation Transcript

    • Wind
      Geography
      Standard: VIII
    • Created by,
      M.Kohila, M.A. M.Phil., B.A.(Eng),B.Ed.,B.A.(His)
      S.M.R.V.H.S.S.,
      VADASERY,
      NAGERCOIL,
      KANYAKUMARI DISTRICT,
      TAMILNADU,
      INDIA
    • LEARNING OBJECTIVES
      Knows that wind is relatively insignificant erosional agent.
      Learns about the causes for sand storms and dust storms.
      Undersands the formation of sand dunes.
    • Content
    • Wind
      Air that moves across the earth’s surface is called wind.
    • Wind erosion
      • Wind erosion is effective in arid and semiarid areas.
      • In humid places moisture bind particles together and vegetation anchor the soil .
      • So wind erosion is negligible.
      • For, wind to be effective ,dryness and scandyvegeation are prerequisites.
      • Wind may pick up, transport, and deposit.
    • Works of wind
      Wind works in two ways to erode the materials.
      They are a. By deflation and 2. by abration
      Blow out
      By deflation -
      By Abration - Ventifacts
      புடைத்தெடுத்தல் - ஊதுபள்ளங்கள்
      உராய்ந்துதேய்த்தல்-பட்டைக்கற்கள்
    • Bed Loads
      Sand Storm
      Dust storm
      Barchan dune
    • Longitudinal dune
      Transverse dune
      Loess
    • Loess and yellow river in China
      Desert in central Asia
    • Wind Erosion – Land forms
    • The end