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SAI INTERNATIONAL  SCHOOL
                    Std VII      GEOGRAPHY        LESSON 2- INSIDE OUR EARTH
                                                    MINDMAP -3







                                                          ROCK

                                      A rock is any naturally occurring solid
                                      mass or aggregate of minerals or
                                      mineraloid matter.









                       Sedimentary rocks                                     Metamorphic rocks

                                                                          is a result of a
                                                                          transformation of a pre-
                   are made when sand, mud                                existing rock. The original
                   and pebbles get laid down                              rock is subjected to very
                   in layers. Over time, these                            high heat and pressure,
                   layers are squashed under                              which cause obvious
                   more and more layers.
                                                                          physical and/or chemical









                                            Examples                         Examples

                                            limestone,                   quartzite, marble,
                                           sandstone,                     slate, granulite,
                                        mudstone, chalk                        gneiss
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