Changes Around Us
“Change is the only permanent thing in life”. Changes keep on happening around us. Some changes are permanent, while some others are temporary. A change in which no new substance is formed is called physical change. Most of the physical changes are reversible in nature. A change in which a new substance is formed is called a chemical change. Most of the chemical changes are irreversible in nature. Growth in plants and animals is an example of chemical change. Similarly, cooking is a chemical change.