Convection, Conduction, Radiation

Front

What is Convection?

Back

Convection is the transfer of heat through a fluid (liquid or gas) caused by the movement of the fluid itself. Warm fluid rises, while cooler fluid sinks, creating a circulation pattern.

Front

What is Conduction?

Back

Conduction is the transfer of heat through direct contact between materials. When two objects at different temperatures touch, heat moves from the hotter object to the cooler one.

Front

What is Radiation?

Back

Radiation is the transfer of heat in the form of electromagnetic waves, such as light. It does not require a medium to travel through, allowing heat to be transferred through empty space.

Front

Example of Convection in everyday life?

Back

A hot air balloon rises because the air inside it is heated, becomes less dense, and rises, while cooler air sinks.

Front

Example of Conduction in everyday life?

Back

When one end of a metal spoon is placed in hot soup, the heat travels through the spoon to the other end, making it warm.

Front

Example of Radiation in everyday life?

Back

The warmth felt from sunlight or from a lamp is due to radiation, as heat travels through the air to warm objects.

Front

What happens to air when it is heated?

Back

When air is heated, it expands, becomes less dense, and rises, creating convection currents.

Front

What is the role of density in Convection?

Back

In convection, warmer fluids are less dense and rise, while cooler fluids are denser and sink, creating a cycle of movement.

Front

How does a radiator heat a room?

Back

A radiator heats the air around it through conduction, and then the warm air rises and circulates through the room by convection.

Front

What is an example of heat transfer through Radiation?

Back

The heat from a campfire warming your face is an example of heat transfer through radiation.