Selina Concise ICSE Solutions for Class 8 Physics Chapter 6 Heat Transfer • Heat is a form of energy. When two bodies are in contact heat flows from body at higher temperature to body at lower temperature till the lower temperature of both is same. • When a body is heated, its molecules move faster about their means position and kinetic energy increases and with fall in temperature their K.E. decreases. • When a substance is heated (i) It expands i.e. a change in size takes place (ii) Change in temperature takes place. (iii) Change in state takes place. • CHANGE OF STATE : “The process of change from one state to another at a constant temperature is called change of state.” • Solid on heating changes into LIQUID. LIQUID on absorbing heat changes to VAPOURS some SOLIDS on heating DIRECTLY change in vapours called SUBLIMATI...
You will find answers of ICSE Text Books here