Convection, Conduction, and Radiation

Front

What is convection?

Back

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

Front

What is conduction?

Back

Conduction is the transfer of heat through direct contact between materials. Heat moves from the hotter object to the cooler one.

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.

Front

How does solar radiation affect objects on the ground?

Back

Solar radiation heats objects like the ground, which can then transfer heat to other objects in contact with it.

Front

What happens to warm air in a room?

Back

Warm air rises because it is less dense than cool air, demonstrating convection.

Front

What is an example of conduction in everyday life?

Back

Walking on warm sand with bare feet is an example of conduction, as heat transfers from the sand to your feet.

Front

What is an example of convection in water?

Back

Warmer water at the surface of a swimming pool is an example of convection, as warm water rises and cool water sinks.

Front

How does heat transfer from a campfire to a person sitting nearby?

Back

Heat from a campfire reaches a person primarily through radiation.

Front

What is the role of density in convection?

Back

Density differences in fluids cause warm, less dense fluid to rise and cool, denser fluid to sink, creating convection currents.

Front

What is an example of radiation?

Back

The heat you feel from the sun on your skin is an example of radiation.