Conduction, Convection and Radiation

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 through physical touch.

Front

What is convection?

Back

Convection is the transfer of heat through the movement of fluids (liquids or gases). It occurs when warmer, less dense areas of a fluid rise and cooler, denser areas sink, creating a circulation pattern.

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, allowing heat to be transferred through space.

Front

Example of conduction in everyday life?

Back

Touching a hot stove and feeling the heat transfer to your hand.

Front

Example of convection in everyday life?

Back

Boiling water in a pot, where hot water rises to the top and cooler water sinks.

Front

Example of radiation in everyday life?

Back

Feeling the warmth of the sun on your skin.

Front

What happens to heat when you hold a hot cup of tea?

Back

Heat flows from the cup to your hand.

Front

How does a thermos bottle keep drinks hot or cold?

Back

A thermos uses insulation to reduce heat transfer by conduction, convection, and radiation.

Front

What is the role of air in convection?

Back

Air acts as a fluid that can carry heat away from hot surfaces and distribute it throughout a space.

Front

What is thermal equilibrium?

Back

Thermal equilibrium is the state in which two objects in contact no longer transfer heat to each other because they are at the same temperature.