Page 1 - 3-Lesson Notes-What is change, Types of change
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SAI INTERNATIONAL SCHOOL
                                                      Class - VI
                                               Subject - Chemistry
                                          Topic – Changes Around Us
                           Sub-Topic – What is Change, Types of change


                                                 Lesson Notes


        WHAT IS CHANGE?

        ➢     When one or more properties of a thing become different, we say it has changes or a

              change has taken place in it.
        ➢     When a change takes place, there may be a change in the state, position, shape, size,

              colour, temperature, composition, or structure of the material of an object.
        ➢     The change in a material does not occur on its own. There is always a ‘cause’ which

              brings about a change in a material.

        ➢     Some of the ways of bringing about changes in materials are by applying heat, light,
              electricity, or force.

        ➢     So, a change can be defined as a noticeable difference in shape, size, colour, state,
              internal structure, or any other property of a substance or an object.

        ➢     Some of the important changes observed by us in our everyday life are:

              •     Formation of curd from milk.
              •     Cooking of food

              •     Burning of fuels

              •     Drying of clothes
              •     Rusting of Iron

              •     Melting of Ice

              •     Germination of seeds

              •     Burning of Fire-works
              •     Ripening of fruits

              •     Growth of living beings

              •     Spoilage of food
              •     Change in seasons and weather












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