Radiation

Convection is a mode of heat transfer.

It occurs in liquids and gases.

Heat is transferred by the movement of particles.

When a fluid is heated, it becomes less dense.

The hot fluid rises upward.

Cooler fluid moves down to take its place.

This continuous movement forms convection currents.

Convection is commonly seen in boiling water.

It also occurs in the atmosphere and oceans.

Convection helps in distributing heat evenly in fluids.