Let us study living things need food to growth (Growth Plants and Animals)

Take a pot with a few seedlings and select any one of them.  Note the length of the stem of the selected seedling.  Keep the pot in a well lighted place and water seedling daily.  Observe the seedling and note its length in the given table every second day.  What your observations?. Has the seedling grown in size or has its size remained the same? What do you conclude?

We know that all the plants and animals are very small in size at the time of their birth.  With the passage of time their size increases.  This is called growth. Living things need food to grow.

Let us study the process of growth in animals. Most of you have pet animals, for example, a parrot, a dog, a cow or a hen.  You must seen small chicks running about with the mother hen. Have you observed them growing? We must remember that growth is a permanent process and the changes which occur during growth are permanent.

On the other hand, non-living things do not increase in size that is they do not show growth.  What have you concluded from these examples. (All living things grow but non-living things do not grow).