We live in a world where change is the only constant. Change can take many forms, including physical, chemical, and biological. The changes around us help us to adapt to situations efficiently, enabling us to sustain efficiently.
We live in an environment that is constantly changing. Some changes are reversible, and some are irreversible.
The changes like that of dough to chapati and back to dough isn’t possible. These kinds of changes are referred to as irreversible changes.
Whereas, if we dry cloth from its wet state and again if we want, it can be changed back to wet. As a cloth can soak out water as well as dry it. These kinds of changes are referred to as reversible changes.
Similarly, changes can also occur by changing their physical states. When lemon is added to milk, it turns to curd. But the reverse is not possible.
Changes can be made by either changing their basic state. Changes can be made by the mixture of 2 substances or by making changes in their normal state. Many changes that take place are reversible, and some are irreversible.
The changes in the state of a substance determine the kind of changes that take place. So, changes can be made by a mixture of substances or by a change in state.