Convection, conduction, radiation

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 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.

Front

What is radiation?

Back

Radiation is the transfer of energy through electromagnetic waves. It does not require a medium and can occur in a vacuum.

Front

Give an example of convection in everyday life.

Back

An example of convection is the sea breeze, where warm air rises over the land and cooler air from the sea moves in.

Front

How does a hot air balloon rise?

Back

A hot air balloon rises because the air inside the balloon is heated, making it less dense than the cooler air outside, causing it to float.

Front

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

Back

Your warm hand transfers energy to the ice cube, causing it to melt.

Front

What is the main difference between conduction and convection?

Back

Conduction occurs through direct contact, while convection involves the movement of fluids.

Front

What is an example of radiation?

Back

An example of radiation is the heat from the sun warming your skin.

Front

What role does density play in convection?

Back

In convection, warm fluids are less dense and rise, while cooler fluids are denser and sink, creating a circulation.

Front

How does a metal pan heat food?

Back

A metal pan heats food through conduction, as heat moves from the hot pan to the food in direct contact.