NCERT Class 11 Geography Practical Chapter 3: Longitude, Latitude, Time | CBSE | English

Dr. Manishika Jain in this video explains NCERT Class 11 Geography Practical Chapter 3: Longitude, Latitude, Time

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Equatorial radius and the polar radius of the earth is not the same
Rotation on axis produces bulge at equator
network of imaginary lines is drawn on a globe or a map to locate various places – geographical grid
The grid consists of two sets of horizontal and vertical lines, which are called parallels of latitudes and the meridians of longitudes

Horizontal lines parallel to each other and appear as circles
Angular distance, in degrees, minutes and seconds of a point north or south of the Equator
Midway between north & south pole is equator
Divide globe in 2 equal half – great circle
Rest are smaller – called parallels or latitude
If parallels of latitude are drawn at an interval of one degree, there will be 89 parallels in the northern and the southern hemispheres each. The total number of parallels thus drawn, including the equator, will be 179.
If earth was perfect sphere – length of one degree would be 111 km and would be same as longitude.
But the degree of latitude changes slightly in length from the equator to the poles. While at the equator, it is 110.6 km at the poles, it is 111.7 km.
Latitude of a place may be determined with the help of the altitude of the sun or the Pole Star.
Draw Parallels: Draw a circle and divide it into two equal halves by drawing a horizontal line in the centre. This represents the equator. Place a protractor on this circle in a way that 0° and 180° line on the protractor coincide with the equator on the paper. Now to draw 20°S, mark two points at an angle of 20° from the equator, east and west in the lower half of the circle. The arms of the angle cut the circle at two points. Join these two points by a line parallel to the equator. It will be 200S.

Chapters:
0:00 Longitude, Latitude,
0:20 Earth is Oblate Spheroid
0:32 Equatorial Radius
1:04 Geographical Grid
1:37 Latitude or Parallel
3:37 Great Circle
4:36 Different Region
4:47 Longitude or Meridian
7:26 Prime (Greenwich) Meridian
8:11 Solving Problems on Latitude & Longitude
10:56 International Data Line
12:21 Asian Countries – American Continent
#Longitude #Meridian #Torrid #Frigid #Developed #Latitude #Parallel #Radius #Spheroid #Equatorial #Manishika #Examrace #examrace #upsc #ugcnet

[kannuvaishnav]

Too good expanation mam . It is too helpful for the not only school exams but also for competitive exams ...👍

[nowMental]

please complete all NCERTS of 11 and 12 Class madam, please, most useful for SSC, railway., UPSC.

[usharana]

Thank you Mam, you are all rounder, great job...

[akashkashyap]

Mam is practical geography imp. From the upsc point of view??

[janvimohapatra]

mam can you plz make a video lecture of class 11 physical geo - cha 3 that is drainage

[jollytyagi]

If greenwich =12pm then what would be the time in 90° west

[sankararamanmahesh]

Mam can you please take class 12 macroeconomic numericals

[historysis]

Mam please can u speak in hindi I can't understand English

[Jod_]

India me 11th class ko pure Hindi kon padhta hai?