Briefly answer the following:
Distinguish between reversible and irreversible changes.
| Reversible changes | Irreversible changes |
| Reversible changes are changes that . | Irreversible changes are changes that . |
| In these changes, and the process can be undone. | In these changes, , and the change is permanent. |
| They are usually . | They are usually . |
| Examples include melting of ice and freezing of water. | Examples include burning of paper and cooking of food. |