Heat transfer-Conduction Convection 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). Warm fluid rises while cooler fluid sinks, 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 warm air behave in a room?

Back

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

Front

What happens when a hot spoon is placed in ice cream?

Back

The warmth of the spoon is conducted to the ice cream, making it easier to scoop out.

Front

How does a microwave heat food?

Back

A microwave uses radiation to transfer heat from the microwave to the food, causing the food to heat up.

Front

What type of heat transfer occurs when a pot is placed on a stove?

Back

Conduction occurs when the pot gets hot due to direct contact with the stove.

Front

What is 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 circulation of air.

Front

What is an example of radiation?

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 role of density in convection?

Back

Density affects convection because warmer fluids are less dense and rise, while cooler fluids are denser and sink.