Conduction, Convection, and Radiation

Front

What is conduction?

Back

Conduction is the transfer of heat through a material without the movement of the material itself, typically occurring in solids. Example: A metal spoon getting hot when placed in a hot soup.

Front

What is convection?

Back

Convection is the transfer of heat through the movement of fluids (liquids or gases). It occurs when warmer areas of a liquid or gas rise and cooler areas sink. Example: Boiling water.

Front

What is radiation?

Back

Radiation is the transfer of heat in the form of electromagnetic waves, which can occur in a vacuum. Example: The heat from the Sun reaching the Earth.

Front

How does heat transfer from a hot object to a cold object?

Back

Heat always flows from a hot object to a cold object until thermal equilibrium is reached.

Front

What is thermal equilibrium?

Back

Thermal equilibrium is the state in which two objects in contact with each other reach the same temperature and no heat flows between them.

Front

What is an example of conduction in everyday life?

Back

An example of conduction is touching a hot stove and feeling the heat transfer to your hand.

Front

What is an example of convection in nature?

Back

An example of convection in nature is the formation of wind, where warm air rises and cool air moves in to replace it.

Front

What is an example of radiation in everyday life?

Back

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

Front

What role does the Sun play in radiation?

Back

The Sun emits energy in the form of radiation, which travels through space and warms the Earth.

Front

What is the difference between conduction and convection?

Back

Conduction involves heat transfer through direct contact in solids, while convection involves heat transfer through the movement of fluids.