Convection, Conduction, and Radiation

Front

What is convection?

Back

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

Front

What is conduction?

Back

Conduction is the transfer of heat through direct contact between materials. It occurs when heat moves from a hotter object to a cooler one.

Front

What is radiation?

Back

Radiation is the transfer of heat in the form of electromagnetic waves, such as light. It does not require a medium to travel through.

Front

How does heat transfer from an area of high temperature to an area of low temperature?

Back

Heat naturally flows from areas of high temperature to areas of low temperature until thermal equilibrium is reached.

Front

What is an example of convection in everyday life?

Back

An example of convection is boiling water in a pot. The hot water rises to the top while cooler water sinks to the bottom.

Front

What is an example of conduction in everyday life?

Back

An example of conduction is touching a hot stove. The heat transfers from the stove to your hand.

Front

What is an example of radiation in everyday life?

Back

An example of radiation is feeling the warmth of the sun on your skin, even when you are not in direct contact with it.

Front

What is the original source of most energy that people use?

Back

The original source of most energy that people use is the energy that reaches Earth by radiation from the sun.

Front

What is the role of the sun in heat transfer?

Back

The sun provides energy through radiation, which warms the Earth and its atmosphere.

Front

What happens to air when it is heated?

Back

When air is heated, it becomes less dense and rises, creating convection currents.