Heat Transfer

Front

What is heat transfer?

Back

Heat transfer is the movement of thermal energy from one object or substance to another due to a temperature difference.

Front

What is conduction?

Back

Conduction is the process of heat transfer through direct contact between materials, where heat energy is transferred from the hotter object to the cooler one.

Front

What is convection?

Back

Convection is the transfer of heat energy in liquids and gases through the movement of the fluid itself, caused by differences in temperature and density.

Front

What is radiation?

Back

Radiation is the transfer of heat energy through electromagnetic waves, which can occur in a vacuum and does not require a medium.

Front

Give an example of conduction.

Back

Walking barefoot on hot sand is an example of conduction, as heat is transferred from the sand to your feet.

Front

Give an example of convection.

Back

A radiator heating a room is an example of convection, as warm air rises and circulates throughout the space.

Front

Give an example of radiation.

Back

The warmth felt from sunlight is an example of radiation, as heat is transferred through electromagnetic waves.

Front

What is the role of temperature difference in heat transfer?

Back

Temperature difference is the driving force for heat transfer; heat moves from areas of higher temperature to areas of lower temperature.

Front

What materials are good conductors of heat?

Back

Metals like copper and aluminum are good conductors of heat due to their free-moving electrons.

Front

What materials are good insulators of heat?

Back

Materials like wood, rubber, and glass are good insulators, as they do not allow heat to pass through easily.