NCERT Exemplar Class 7 Science Chapter 6 – Physical and Chemical Changes
The chapter Physical and Chemical Changes in Class 7 Science helps students differentiate between changes that are temporary and reversible and those that are permanent and irreversible. Physical changes include processes like melting, boiling, evaporation, condensation, and dissolution, which do not alter the composition of a substance. In contrast, chemical changes result in the formation of new substances with different properties, such as rusting of iron, burning of wood, and cooking of food. The chapter also explains crystallization as a method of purifying solids. By learning about these concepts, students gain a strong foundation for higher studies in chemistry. The NCERT Exemplar Solutions for Class 7 Science Chapter 6 provide higher-order reasoning and practice questions that help learners apply their knowledge to real-life situations, like preventing rust or understanding industrial processes. Similarly, the NCERT Solutions for Class 7 Science explain the textbook exercises in simple language, making it easier for students to prepare for exams. With a balance of theory and application, this chapter enables learners to understand the importance of changes in everyday life and builds awareness about processes used in nature and industries.