Physical and Chemical Changes Class 7 Notes

Physical and Chemical Changes Class 7 Science Notes – Chapter 6

Changes can be classified into two types viz physical change and chemical change.

• Physical change is a change in which the molecular arrangements are rearranged and the chemical composition remains as it is. It is usually a reversible process. During a physical change, there is no formation of the new product. Physical properties such as size, color, shape, of the substances changes. Example, freezing of water.
• A chemical change is a change in which the chemical composition of a substance is changed to transform into a new substance. It is usually an irreversible process. Whenever a chemical change occurs it forms a new product. Example, the setting of curd. Please refer Physical and Chemical Changes Class 7 Notes for more revision notes.