Heat Transfer: Conduction, Convection, Radiation

Front

What is conduction?

Back

Conduction is the transfer of heat through a material without the movement of the material itself. It occurs when two objects at different temperatures are in direct contact.

Front

What is convection?

Back

Convection is the transfer of heat through the movement of fluids (liquids or gases). It occurs when warmer parts of a fluid rise and cooler parts 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 empty space.

Front

How does heat transfer occur in a swimming pool?

Back

In a swimming pool, warm water at the surface rises due to convection, while cooler water sinks, creating a circulation of water.

Front

What happens to a spoon when it is stirred in hot coffee?

Back

The spoon gets hot due to conduction, as heat is transferred from the hot coffee to the cooler spoon through direct contact.

Front

What is the direction of heat flow in heat transfer?

Back

Heat always flows from the hotter substance to the colder substance.

Front

Give an example of conduction in everyday life.

Back

An example of conduction is touching a hot stove and feeling the heat transfer to your hand.

Front

Give an example of convection in everyday life.

Back

An example of convection is the way warm air rises and cool air sinks in a room, creating a draft.

Front

Give 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 role does convection play in weather systems?

Back

Convection is responsible for the movement of air masses in the atmosphere, leading to the formation of weather systems.