NCERT Class 7 Geography Chapter 4: Air Youtube Lecture Handouts

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Watch video lecture on YouTube: NCERT Class 7 Geography Chapter 4: Air NCERT Class 7 Geography Chapter 4: Air
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NCERT Class 7 Geography

Chapter 4: Air

Composition of Atmosphere

Image of Composition of Atmosphere

Image of Composition of Atmosphere

Image of Composition of Atmosphere

Watch video lecture on YouTube: Watch Weather, Climate & Composition of Atmosphere - 11 Major Gases Weather, Climate & Composition of Atmosphere - 11 Major Gases
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Structure of Atmosphere

Watch video lecture on YouTube: Watch: Layers of Atmosphere - 4 Layers in Thermal & 2 in Magneto-Electrical Structure Layers of Atmosphere - 4 Layers in Thermal & 2 in Magneto-Electrical Structure
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Image of Structure of Atmosphere

Image of Structure of Atmosphere

Image of Structure of Atmosphere

Weather vs. Climate

  • Earth receives only 1 in 2,000,000,0000 parts of the sun’s energy

  • Weather: hour to hour / day to day

Instruments

  • Thermometer: Temperature

  • Barometer: Pressure

  • Rain Gauge: Amount of Rainfall

  • Wind Vane: Direction of Wind

Temperature

  • Degree of hotness or coldness of air

  • Temp Change b/w day & night, season to season (Summers are hot)

  • Insolation: Incoming Solar Radiation

  • Equator to Poles

  • High Temp in Cities: Concrete, Cement, Asphalt – Trap Heat

  • Standard unit of measuring temperature is degree Celsius

Watch video lecture on YouTube: Watch Temperature - Insolation, Heat Transfer, 3 Lapse Rate & 4 Scales in Climatology Temperature - Insolation, Heat Transfer, 3 Lapse Rate & 4 Scales in Climatology
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Pressure

  • Pressure exerted by the weight of air on the earth’s surface

  • Pressure with height (Max. at sea level)

  • Distribution – Horizontally

  • Air heats & rise – High Temp. – Creates LP – Cloudy & Wet

  • Low Temp.– Air is cold, heavy, dense, sinks – HP – Clear & Sunny Skies

Image of High Pressure And Low Pressure

Image of High Pressure and Low Pressure

Image of High Pressure And Low Pressure

Watch video lecture on YouTube: Temperature - Insolation, Heat Transfer, 3 Lapse Rate & 4 Scales in Climatology Watch: Temperature - Insolation, Heat Transfer, 3 Lapse Rate & 4 Scales in Climatology
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Watch video lecture on YouTube: Winds - Coriolis Effect, 3 Planetary and Local Winds in Climatology Winds - Coriolis Effect, 3 Planetary and Local Winds in Climatology
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Image of Cool Water And Warm Water

Image of Cool Water and Warm Water

Image of Cool Water And Warm Water

Moisture

Image of Cyclonic Rainfall , Relief Rainfall And Convectional Rainfall

Cyclonic Rainfall , Relief Rainfall and Convectional Rainfall

Image of Cyclonic Rainfall , Relief Rainfall And Convectional Rainfall