• The objects do not undergo a change by themselves.
  • There is always a " CAUSE " to bring a change in the object.

Example  1

  • Ice is melted to form water.
  • Here," HEAT" is the cause for the melting of the ice.


Example 2

Rusting of iron t akes place because it reacts with the oxygen and moisture present in air.

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Maninder Singh's photo - Co-founder, Teachoo

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Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 14 years and a teacher from the past 18 years. He teaches Science, Economics, Accounting and English at Teachoo