Chapter 6: Changes Around Us

The sixth chapter of Class 6 Science, Changes Around Us, helps students explore the different kinds of changes that occur in our surroundings. Everything around us—whether living or non-living—undergoes changes. Some are fast, some are slow, and some are reversible while others are permanent. This chapter builds curiosity by making students observe common daily life changes and then classify them scientifically.

The chapter explains the difference between reversible and irreversible changes. Reversible changes are those that can be undone, such as melting ice into water and then freezing it back into ice. Irreversible changes, on the other hand, cannot be reversed—for example, burning paper or cooking food. It also discusses physical and chemical changes, helping students identify whether the material itself changes or only its form. Another important concept is how changes can be brought about by heating, cooling, mixing, or applying force. For example, heating causes wax to melt, cooling turns water into ice, and applying force can change the shape of clay. With NCERT Solutions for Class 6 Science, students can learn step-by-step answers to textbook exercises that ask them to classify changes or explain their causes. The NCERT Exemplar for Class 6 Science Solutions provides additional practice with questions such as why stretching a rubber band is reversible but breaking it is not, or why rusting of iron is an irreversible change.

Important points of the chapter include:

Classification of changes: reversible and irreversible.
Physical vs. chemical changes.
Role of heating, cooling, and force in changes.
Real-life applications of different types of changes.

By practicing NCERT and Exemplar problems, students not only memorize definitions but also develop reasoning skills to identify and explain changes they observe daily. This builds a strong foundation for chemistry in higher classes.