Convection

This is a method of heat transfer in fluids by the actual movement of particles or molecules from one point to another. This occurs mostly in fluid (liquid and gas).

When water is heated from a container, it is observed that it is the lower part of the container that is closer to the source of heat that gets hot faster than the upper part. This is because the particles or molecules at the lower part of the container acquire energyEnergy is the ability to do work. Energy exists in several forms such as heat, kinetic or mechanical energy, light, potential energy, and electrical energy. Units of Energy: The SI unit... More from the source of heat and become lighter and can move to the upper part, while the colder ones at the liquid surface replace the higher ones,

The heated molecules move in a circular pattern, thereby setting up a convection current until the liquid starts boiling.

Convection Current in Nature – Land and Sea Breezes: