We do not have magical powers, of course. But, we can still change a
few things around us, perhaps many things. Can you list a few things you
can change around you, with no magic involved?
Many changes are taking place around us on their own. In the fields,
the crops change from time to time. Sometimes, leaves fall from trees,
change colour and dry out. The flowers bloom and then wither away. Are
any changes happening in your body? Your nails grow, your hair grows,
you grow taller and your weight increases as you grow. Did you realise
earlier that so many changes are taking place around you all the time?
Can some of the changes be grouped together?
How can we group various changes? It might help, if we find some similarities between them.
Suppose, you are asked the same three questions which you answered after Activity 3. What would your answers be, now?
We see that, the changes which have occurred in the Activity 4, 5 and 6 can not be reversed.
You use a pencil and an eraser. With repeated use, their shape and size changes. Can we reverse this change?
You must have seen a potter working on his wheel. He shapes a lump of
clay into a pot. Can this change be reversed? He then bakes the pot in
an oven. Now, can this change be reversed?
Some common changes are given in Table 1. Which of these changes, do you think can be reversed?
We find that one way we can group changes is to see if they can be reversed.
Post a Comment
Post a Comment