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Changes Around Us

Reversible and Irreversible Changes

Slow and fast changes

Slow changes are those which occur very slowly. On the other hand, fast changes are those which occur very fast.

The given table classifies a few changes as slow and fast.

Slow change

Fast change

Rusting of iron

Bursting of a balloon

Growth of plants

Burning of paper

Curdling of milk

Lighting of electric bulb

 


Desirable and undesirable changes

Change brought about by a person or the nature, which is useful, is called a desirable change. On the other hand, change brought about by a person or the nature, which is harmful, is called an undesirable change.

Some examples of desirable changes

  • Formation of manure from animal dung and dead leaves is a desirable change as these waste materials are converted to useful manure.
  • Formation of curd is a desirable change as it is more easily digestible than milk.
  • Cooking of food is a desirable chang…

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