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SAI INTERNATIONAL  SCHOOL
                                 Std VII      GEOGRAPHY        LESSON 4- AIR
                                                         MINDMAP  2









                                                        STRUCTURE OF
                                                        ATMOSPHERE


















           TROPOSPHERE                                  MESOSPHERE                                   EXOSPHERE



                                  STRATOSPHERE                                THERMOSPHERE



                                                        above the                                   the
           is the lowest                                stratosphere
           layer of Earth's                             and below the         above the             outermost
                                                                                                    region of a
           atmosphere,            above the                                   mesosphere and        planet's
                                  troposphere,          thermosphere
                                  extending to                                below the             atmosphere.
                                  about 50 km                                 exosphere.
                                  above the
                                  earth's surface
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