#104 (Q) Heat Transfer: Conduction, Convection, Radiation

Front

What is conduction?

Back

Conduction is the transfer of heat through direct contact between materials. It occurs when molecules collide and transfer energy to neighboring molecules.

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 fluid rises and cooler, denser fluid sinks.

Front

What is radiation?

Back

Radiation is the transfer of heat in the form of electromagnetic waves. It does not require a medium and can occur in a vacuum.

Front

How does heat transfer occur in a pot on a stove?

Back

Heat transfer occurs through conduction, as the pot directly contacts the hot stove surface.

Front

What happens to warm air in a room?

Back

Warm air rises due to convection, as it is less dense than cooler air.

Front

How does a chair get warm when placed near a fire?

Back

The chair gets warm due to radiation, as heat is transferred from the fire to the chair without direct contact.

Front

What is an example of convection in everyday life?

Back

An example of convection is the circulation of warm air in a room or the movement of water in a boiling pot.

Front

What is an example of conduction in everyday life?

Back

An example of conduction is touching a hot metal spoon that has been in a pot of hot soup.

Front

What is an example of radiation in everyday life?

Back

An example of radiation is feeling the warmth of the sun on your skin.

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 circulation pattern.