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               SAI INTERNATIONAL SCHOOL
               STD VI                                                             SUB:GEOGRAPHY
               CH-2        SUBTOPIC-3      LONGITUDES         MINDMAP-3



                                                  LONGITUDE

                                           Lines of reference to

                                           locate places
                         Vertically                                          Prime
                         drawn from                                          Meridian  at
                         South pole                                          0°-Greenwich
                         to North          Measured in
                         pole.                                               Total: 180
                                           Degrees(°)                        meridians to
                                                                             the East and
                                           Minutes(‘)                        West of
                                                              Distance       Greenwich
                                           Seconds(“)
                                                              between
                                                              meridians          Meridians are
                                                              decreases          semi circular.
                                                              and                Two
                                                              becomes            meridians
                                                              0 at poles.
                                                                                 One toEast

                                                                                 and to West
                                                                                 make full
                                                                                 circle.
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