Review: Convection, Conduction, Radiation

Front

What is conduction?

Back

Conduction is the transfer of heat through direct contact between molecules, where heat moves from the warmer object to the cooler object.

Front

What is convection?

Back

Convection is the transfer of heat in fluids (liquids and gases) through the movement of the fluid itself, where warmer parts of the fluid rise and cooler parts sink.

Front

What is radiation?

Back

Radiation is the transfer of heat in the form of electromagnetic waves, which can occur in a vacuum, such as heat from the sun reaching the Earth.

Front

Give an example of conduction.

Back

An example of conduction is a metal spoon getting hot when placed in a pot of boiling water.

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 warmth from a campfire or the sun without direct contact.

Front

What happens to molecules during conduction?

Back

During conduction, molecules in the warmer object vibrate faster and transfer their energy to the slower-moving molecules in the cooler object.

Front

What is a common everyday example of convection?

Back

A common example of convection is boiling water, where hot water rises to the top and cooler water sinks.

Front

How does radiation differ from conduction and convection?

Back

Radiation does not require a medium (like air or water) to transfer heat, while conduction and convection do.

Front

What is thermal equilibrium?

Back

Thermal equilibrium is the state reached when two objects in contact have the same temperature and no heat flows between them.