Conduction Convection and Radiation

Front

What is conduction?

Back

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

Front

What is convection?

Back

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

Front

What is radiation?

Back

Radiation is the transfer of energy through electromagnetic waves. It does not require a medium (like air or water) to travel, allowing heat to be transferred through empty space.

Front

How does thermal energy transfer between two objects at different temperatures?

Back

Thermal energy always transfers from the warmer object to the cooler object until they reach thermal equilibrium.

Front

What is an example of conduction in everyday life?

Back

Ironing a shirt is an example of conduction, where heat from the iron is transferred directly to the fabric.

Front

What is an example of convection in a home?

Back

A heater warming a room by circulating warm air is an example of convection.

Front

What is an example of radiation?

Back

The warmth felt from the sun on your skin is an example of radiation, as heat travels through space.

Front

What happens to air when it is heated?

Back

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

Front

What is thermal equilibrium?

Back

Thermal equilibrium is the state reached when two objects in contact have the same temperature, resulting in no net heat transfer between them.

Front

What is the direction of heat flow?

Back

Heat flows from a hotter substance to a colder substance.