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SAI INTERNATIONAL SCHOOL
                                               Subject - Chemistry

                                                      Class - VII
                                      Topic - SOIL - A Natural Resource
                                          Subtopic - Concept Mapping


                                              (SOIL- A Natural Resource)

                                                                          Weathering, Agents involved in

               a)  Formation of Soil,                                      weathering.
                                                                           Parent rock and humus present
                   Composition of Soil
                                                                           in soil.
                                                                          Detailed study about different
               b)  Soil Profile,                                           horizons of the soil profile.
                   Types of Soil                                          Study about Sandy, Clayey and
                                                                           Loamy soils.
                                                                          Texture, Percolation rate and
                                                                           Moisture content of Soil.
               c)  Properties of Soil,                                    Names of organisms and how
                   Organisms found in Soil,
                   Soil and Crops.                                         they are useful.
                                                                          What type of soil is suitable for
                                                                           which crop
               d)  Soil Erosion,                                          Definition
                   Soil Pollution,                                        Causes
                   Soil Conservation.                                     Methods for prevention



































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