We can see many changes in the world around us. The world around us has many living things. All living things change as they grow.
(i) A pup becomes a dog.
(ii) Kitten grows into a cat.
(iii) A calf becomes a cow.
Non-living things may also change.
(i) Ben blows into a balloon. How will the balloon look afterwards you can blow a balloon and see it practically.
(ii) What happens when Ben pulls a rubber band? When Ben lets go of the rubber band, what happens?
What changes can you see in these things?
(i) Light a candle and then see after an hour.
(ii) A new pencil used and then after one week later.
All these things changed their size. Some things change their shape.
We watch our mother making chapattis. As she rolls out the dough, it changes its shape.
There are many other changes you can see around you. We have noticed that the Moon changes its shape every night.
Now we will discuss about other changes you notice every day.
Some changes in nature take place in different seasons.
Some trees lose their leaves in winter. Other trees lose their leaves in summer. Some trees have flowers in summer. Some have fruit in summer, others have fruit in winter. These changes happen every year.
Fruit ripen in a warm place and often their color changes.
Can you name a fruit that changes its color when it ripens? Color of unripe mango is green and ripe mango is yellow.
Some other changes happen because of heating.
What happens when a match burns?
When a match burns, it changes color. It turns black. It looks different.
What happens when a piece of paper burns?
It turns brown and then black.
If a piece of coal is burnt, it changes into ash. The coal was hard and black. The ash is grey and soft.
Ask your teacher or parents to show you these changes. Never light matches on your own. You may get badly hurt.
Ask your mother to show you some uncooked rice. Look at the cooked rice that you eat. Which one is hard? Which one is soft and fluffy? Most foods become soft and ready to eat when they are cooked.
What happens to ice cubes when they are left out in a warm place?
It starts melting.
These are the examples of some of the changes in the world around us.