4.7 explain the role of convection in everyday phenomena

4.7 explain the role of convection in everyday phenomena

Boiling water uses the role of convection to transfer heat. When fire is started, molecules at the bottom gets heated and expands. It gains kinetic energy and rises upwards and the molecules at the top sinks downwards. Now, the molecules at the bottom gets heated again and rises upwards while the others sink down. This keep in a continuous process and current known as convection current.