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Class6 Atmosphere


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Class6 Atmosphere

  1. 1. Presentation made by Mudit Singh Vats Class VI-A K.B. D.A.V. Senior Secondary Public School Sec-7B Chandigarh The Atmosphere
  2. 2. The Atmosphere <ul><li>. </li></ul><ul><li>The surface of earth is surrounded by an envelop of air called atmosphere. </li></ul><ul><li>It extends approximately 70 Kilometers above the earth’s surface. </li></ul><ul><li>The atmosphere gradually thins out into space. The atmosphere is the thickest near the earth. </li></ul>
  3. 3. Composition of the Atmosphere <ul><li>Atmosphere is composed of air which consists of different colorless gases. </li></ul><ul><li>Nitrogen and oxygen constitute nearly 99% of the total gases present in the atmosphere. </li></ul>
  4. 4. Composition of the Atmosphere Variable Dust and smoke Variable Water vapours 0.03 Carbon dioxide 0.91 Argon 20.94 Oxygen 78.08 Nitrogen % Gas
  5. 5. Layers of the Atmosphere
  6. 6. Layers of the Atmosphere <ul><li>There are 4 principal layers in the atmosphere. </li></ul><ul><li>First layer is the troposphere that is where the weather is made </li></ul><ul><li>Then comes stratosphere which is where planes fly. The ozone layer is inside the stratosphere. </li></ul><ul><li>Next is the mesosphere that is where rocks burn so that they do not hit the earth </li></ul><ul><li>The last layer is the Ionosphere after which the space starts. </li></ul>
  7. 7. Importance of the Atmosphere <ul><li>Atmosphere provides oxygen which is required for breathing and sustaining life. </li></ul><ul><li>It prevent earth from severe heat of the Sun during the day time and keeps earth warm in the night by holding back the heat received earlier. </li></ul><ul><li>It protect earth from harmful radiations and meteors. </li></ul>
  8. 8. Importance of the Atmosphere <ul><li>The atmosphere also enables us to hear and communicate because it carries sound from one place to another. </li></ul><ul><li>It is responsible for changes in weather, blowing of wind, storms and cyclones etc. </li></ul>
  9. 9. Thanks