Changes take place because of different
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Answer:
What is change?
When a small plant grows into tree, we call it change. When ice melts into water, we call it change. When water freezes into ice, we call it change. When a bulb is lighted, we call it change. When you put a new dress, it is called change. When you polish your shoes to get shine, we call it change. The sun rises in the east and sets in the west everyday. We see the different sizes of moon in the sky during night.
Thus, we see many things changing around us continuously. In fact without change life is possible. Thus it becomes necessary to study the changes scientifically.
To study changes in systematic way, changes are divided into various category.
Classification of Change
Fast and slow changes
Some changes are slow means they take a longer time, while some are very fast i.e. happened in a short time.
Fast changes
Changes takes place in short period of time are called fast changes. Some changes happens very quickly, and very fast. Such as bursting of crackers, melting of ice, burning of match stick etc. are some examples of fast changes.
Slow changes
Changes those take more time to be happened are called slow changes. Some changes like, ageing of man, ageing of animals, growth of plant, rusting of iron, etc. takes more time to occur; these are some examples of slow changes
Reversible and Irreversible changes
Reversible change
Changes which can be reversed are called Reversible Changes. This means we can get the matter back after change.
Example: Change of water into vapour. We can get water back from vapour. Thus, change of water into vapour is a reversible change.