Class6 Atmosphere
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The document summarizes key aspects of the atmosphere. It describes the atmosphere as an envelope of air surrounding the Earth's surface that extends approximately 70 kilometers high. The atmosphere is composed primarily of nitrogen and oxygen gases. It discusses the four principal layers - troposphere, stratosphere, mesosphere, and ionosphere. Finally, it outlines the importance of the atmosphere in providing oxygen, regulating temperature, protecting from radiation, enabling sound transmission, and influencing weather.
Class6 Atmosphere
- 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. The Atmosphere . The surface of earth is surrounded by an envelop of air called atmosphere. It extends approximately 70 Kilometers above the earth’s surface. The atmosphere gradually thins out into space. The atmosphere is the thickest near the earth.
- 3. Composition of the Atmosphere Atmosphere is composed of air which consists of different colorless gases. Nitrogen and oxygen constitute nearly 99% of the total gases present in the atmosphere.
- 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. Layers of the Atmosphere
- 6. Layers of the Atmosphere There are 4 principal layers in the atmosphere. First layer is the troposphere that is where the weather is made Then comes stratosphere which is where planes fly. The ozone layer is inside the stratosphere. Next is the mesosphere that is where rocks burn so that they do not hit the earth The last layer is the Ionosphere after which the space starts.
- 7. Importance of the Atmosphere Atmosphere provides oxygen which is required for breathing and sustaining life. 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. It protect earth from harmful radiations and meteors.
- 8. Importance of the Atmosphere The atmosphere also enables us to hear and communicate because it carries sound from one place to another. It is responsible for changes in weather, blowing of wind, storms and cyclones etc.
- 9. Thanks