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.

Front

What is convection?

Back

Convection is the transfer of heat through the movement of fluids (liquids or gases). Warm fluid rises, while cooler fluid sinks, creating a cycle.

Front

What is radiation?

Back

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

Front

Example of conduction in everyday life?

Back

An example of conduction is when you touch a hot stove and feel the heat transfer to your hand.

Front

Example of convection in everyday life?

Back

An example of convection is when warm air rises from a heater and circulates around the room.

Front

Example of radiation in everyday life?

Back

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

Front

What happens to warm air in a room?

Back

Warm air rises because it is less dense than cooler air.

Front

How does a thermos keep drinks hot?

Back

A thermos uses insulation to reduce heat transfer by conduction, convection, and radiation.

Front

What is the role of density in convection?

Back

In convection, warm fluids become less dense and rise, while cooler fluids are denser and sink.

Front

How does heat transfer in a pot of boiling water?

Back

Heat transfers through convection as the hot water at the bottom rises and cooler water sinks.