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SAI INTERNATIONAL SCHOOL
                                                      Class - VI
                                               Subject - Chemistry
                                              Topic – Air Around Us
                           Sub-Topic – Role Of The Atmosphere, Ozone Layer


                                                Home Assignment



               Objective Questions
            1.     UV rays may cause                                                                      U

                       a)  Skin cancer.
                       b)  Eye problem.
                       c)  Throat infection.
                       d)  Both a) and b).

            2.                                                                                            U
                  The full form of CFC is

                      a)  Coal & fuel company.
                      b)  Carbon fluorine carbon.
                      c)  Chlorofluorocarbon.
                      d)  Chlorine formic carbon.

            3.     The atmosphere maintains right………… on the earth.                                       C

                      a)  Pressure.
                      b)  Surface area.
                      c)  Temperature.
                      d)  Density.

            4.     The ozone layer absorbs ……% of UV rays.                                                C
                       a)  70-83%
                       b)  85-89%
                       c)  90-93%
                       d)  93-99%

            5.     Ozone layer present in the atmosphere, in the region between-------------              C
                      a)  10-30Km.
                      b)  10-50Km.
                      c)  10-70Km.
                      d)  10-90Km.













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