Conduction, Convection, and Radiation

Front

What is conduction?

Back

Conduction is the transfer of heat through direct contact between materials. It occurs when heat moves from a hotter object to a cooler one through physical touch.

Front

What is convection?

Back

Convection is the transfer of heat through the movement of fluids (liquids or gases). It occurs when warmer, less dense areas of a fluid rise and cooler, denser areas sink, 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

Example of conduction in everyday life?

Back

Walking on warm sand with bare feet is an example of conduction, as heat is transferred from the sand to your feet.

Front

Example of convection in everyday life?

Back

Boiling water in a pot is an example of convection, as the heat from the stove warms the water at the bottom, causing it to rise and circulate.

Front

Example of radiation in everyday life?

Back

Feeling warmth from the sun or a heat lamp is an example of radiation, as heat is transferred through electromagnetic waves.

Front

What happens when you touch a hot stove?

Back

When you touch a hot stove, conduction occurs, transferring heat from the stove to your finger, which can cause a burn.

Front

How does a heat lamp keep baby chickens warm?

Back

A heat lamp uses radiation to transfer heat to the baby chickens, warming them without direct contact.

Front

What is the role of density in convection?

Back

Density plays a key role in convection; warmer fluids are less dense and rise, while cooler fluids are denser and sink, creating a circulation pattern.

Front

What type of heat transfer occurs in a fireplace?

Back

In a fireplace, both radiation (from the fire to the surrounding area) and convection (as warm air rises and circulates) occur.