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SAI INTERNATIONAL SCHOOL


                                                   CLASS -IV- SCIENCE


                                                        Chapter 11- THE SOLAR SYSTEM

                                                         Sub Topic- Structure of the Earth









                                                         LAYERS OF
                                                         THE EARTH








                                     CRUST                              CORE
                                                     MANTLE




               Notes:
                          The process of formation of Earth led to the formation of three
                          layers of the earth-
                           i)Crust- The outer most layer of the earth. The  coolest layer, with
                          plants and animals. Mainly consists of rocks such as granite and
                          basalt.
                           ii)Mantle-It is just below the crust. It is a hot layer made
                          of rocks, minerals and metals, such as iron. Its temperature
                          increases with depth.

                            iii)Core- It is just below the mantle. It is divided into inner core and
                          outer core. Inner core is solid ball of iron and outer core is molten
                          iron. Inner core temperature is 4000 degree Celsius.
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