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of suitable examples.
                  Q3     State four common causes affecting the physical and chemical changes.            1
                  Q4     Which effect can heating and cooling bring about in a given substance?           1
                  Q5     Give two examples of change in which the application of force causes a           1
                         change.


                            Concept – Contraction and Expansion and their applications

                  Q1.  Give two applications of Expansion and Contraction in case of solids.              1
                  Q2     Do you think gases also expand and contract? If yes, explain how?                1
                  Q3     Give two applications of Expansion and Contraction in case of liquids.           1
                  Q4     The extent of expansion and contraction is most and least in which state         1
                         of matter?
                  Q5     What is corrosion? Is it physical or chemical change?                            1


























































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