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 air or liquid rises, while cooler air or liquid 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 example of conduction is when a metal spoon gets hot after being placed in a hot cup of coffee.

Front

Give an example of convection.

Back

An example of convection is warm air rising and cool air sinking in a room, creating a circulation of air.

Front

Give an example of radiation.

Back

An example of radiation is feeling the warmth of the sun on your skin, even when you are not in direct contact with it.

Front

What happens to warm air in convection?

Back

In convection, warm air rises because it is less dense than cooler air.

Front

What happens to cool air in convection?

Back

In convection, cool air sinks because it is denser than warm air.

Front

What is the role of insulation in heat transfer?

Back

Insulation reduces the transfer of heat by conduction, convection, or radiation, helping to keep heat in or out of a space.

Front

What is the relationship between temperature and conduction?

Back

The greater the temperature difference between two objects, the faster the rate of heat transfer by conduction.