Convection:

                                    Convection is the transfer of heat through the movement of a fluid, such as a liquid or gas. It's like a hot air balloon, where the warm air rises and the cooler air sinks.

Key points:

Fluids are involved: Convection only happens in liquids and gases.

Movement is key: The heat is transferred by the movement of the fluid itself.

Warm rises, cool sinks: Warm fluids are less dense than cold fluids, so they rise. This creates a cycle of warm fluid rising and cool fluid sinking.

Real-world examples:

Boiling water: The hot water rises to the surface and the cooler water sinks to the bottom.

A hot air balloon: The hot air inside the balloon rises, making the balloon float.

A radiator heating a room: The warm air from the radiator rises and circulates throughout the room.

Remember: Convection is one of the three main ways that heat is transferred. It's important to understand how things like weather and heating systems work.