Conduction, Convection, & Radiation

Front

What is conduction?

Back

Conduction is the transfer of heat through a material without the movement of the material itself. It occurs when two objects at different temperatures are in direct contact.

Front

What is convection?

Back

Convection is the transfer of heat through the movement of fluids (liquids or gases). Warm fluid rises while cooler fluid sinks, creating a circulation pattern.

Front

What is radiation?

Back

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

Front

Give an example of conduction.

Back

An ice cube melting in a person’s hand is an example of conduction, where heat is transferred from the hand to the ice.

Front

Give an example of convection.

Back

A pot of water boiling on a stove is an example of convection, where hot water rises and cooler water sinks.

Front

Give an example of radiation.

Back

The sun heating water in a swimming pool is an example of radiation, where heat travels through space to warm the water.

Front

In heat transfer, from which substance does heat flow?

Back

Heat always flows from the hotter substance to the colder substance.

Front

What happens to air when it is heated?

Back

When air is heated, it becomes less dense and rises, leading to convection currents.

Front

What is the role of heat lamps for baby chickens?

Back

Heat lamps provide warmth through radiation, keeping baby chickens warm.

Front

How does heat transfer occur in a furnace?

Back

A furnace heats the air in a room primarily through convection, as warm air circulates.