Convection, Conduction and Radiation

Front

What is conduction?

Back

Conduction is the transfer of heat or electricity directly through a substance, where energy is passed from one molecule to another without the movement of the substance itself.

Front

What is convection?

Back

Convection is the transfer of heat through the movement of fluids (liquids or gases) caused by differences in temperature and density, where warmer, less dense fluid rises and cooler, denser fluid sinks.

Front

What is radiation?

Back

Radiation is the transfer of energy through electromagnetic waves, such as sunlight, which can travel through a vacuum.

Front

What are the three methods of thermal energy transformation?

Back

The three methods of thermal energy transformation are conduction, convection, and radiation.

Front

How does warm air behave in a room?

Back

Warm air rises because it is less dense than cooler air, leading to convection currents.

Front

What happens to thermal energy when you hold an ice cube in your hand?

Back

Thermal energy is transferred from your hand to the ice cube, causing the ice to melt.

Front

What is the primary method of heat transfer in liquids and gases?

Back

Convection is the primary method of heat transfer in liquids and gases.

Front

What is an example of conduction in everyday life?

Back

An example of conduction is touching a hot stove, where heat is transferred 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.

Front

How many kinds of heat transfer are there?

Back

There are three kinds of heat transfer: conduction, convection, and radiation.