Page 2 - HA
P. 2

.

        7









                Identify the layer of atmosphere from the above picture.

                    a) Stratosphere
                    b) C Exosphere
                    c) D Ionosphere
                    d) Thermosphere

            8   Which is the correctly matched pair-
                    a) Mesosphere- satellite
                    b) Thermosphere- ozone layer
                    c) Troposphere- weather phenomena
                    d) Exosphere- clouds
            9   Which layer of the atmosphere has the highest density of gas molecules?

                    a) Mesosphere
                    b) Exosphere
                    c) Troposphere
                    d) Thermosphere

          10    Which layer of atmosphere is also known as ionosphere?

                    a) Mesosphere
                    b) Exosphere
                    c) Troposphere
                    d) Thermosphere

               SUBJECTIVE                                                                          Pg.No. Marks
          1    What is the other name of the thermosphere?                                         22       1
          2    why the density of the atmosphere is maximum near the Earth`s surface?              22       1
          3    Why do mountaineers always carry a supply of oxygen with them?                      22       1
          4    Write any three features of Exosphere.                                              22       3
          5    How is the troposphere important for us? Write any three points.                    22       3
   1   2