Conduction, Convection, & Radiation

Front

What is conduction?

Back

Conduction is the transfer of heat through direct contact between materials. It occurs when two objects at different temperatures touch each other, allowing heat to flow from the hotter object to the cooler one.

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, which is why the Sun's heat can reach Earth through the vacuum of space.

Front

Give an example of conduction.

Back

An example of conduction is when you touch a hot metal spoon and it burns your hand.

Front

Give an example of convection.

Back

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

Front

Give an example of radiation.

Back

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

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

How does conduction occur in cooking?

Back

Conduction occurs in cooking when a pot is placed on a stove, and heat transfers from the burner to the pot and then to the food inside.

Front

What is the role of insulators in conduction?

Back

Insulators are materials that slow down the transfer of heat through conduction, helping to keep heat in or out.