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Dr. Manishika Jain explains the NCERT Class 7 Geography Chapter 4: Air.
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Lectures organized in topics and subtopics:
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The following topics have been covered:
Composition of Atmosphere
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
Chapters:
0:00 introduction: NCERT Class 7 Geography Chapter 4: Air
0:08 Composition of Atmosphere
3:16 Structure of Atmosphere
5:51 Weather vs. Climate
7:32 Instruments
7:37 Thermometer
7:48 Barometer
7:58 Rain Gauge
8:10 Wind Vane
8:26 Temperature
11:17 Pressure
15:42 Winds
19:53 Moisture
#Moisture #Pressure #Concrete #Temperature #Gauge #Weather #Structure #Atmosphere #Composition #Manishika #Examrace
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
Winds
Moisture
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Dr. Manishika Jain served as visiting professor at Gujarat University. Earlier she was serving in the Planning Department, City of Hillsboro, Hillsboro, Oregon, USA with focus on application of GIS for Downtown Development and Renewal. She completed her fellowship in Community-focused Urban Development from Colorado State University, Colorado, USA. For more information –
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