Heat Transfer

Front

What is convection?

Back

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

Front

How does heat transfer occur when holding hands with someone?

Back

Heat energy from the warmer hand transfers to the cooler hand through conduction, which is the direct transfer of heat between objects in contact.

Front

What is radiation in terms of heat transfer?

Back

Radiation is the transfer of heat through electromagnetic waves. It does not require a medium (like air or water) to transfer heat.

Front

What is conduction?

Back

Conduction is the transfer of heat through direct contact between materials. It occurs when two objects at different temperatures touch each other.

Front

What is an example of convection in everyday life?

Back

An example of convection is boiling water. The hot water at the bottom rises to the top, while cooler water descends to the bottom.

Front

What is an example of radiation?

Back

An example of radiation is feeling the warmth of the sun on your skin, even though you are not in direct contact with it.

Front

What happens to air when it is heated?

Back

When air is heated, it becomes less dense and rises, causing cooler air to sink and create a convection current.

Front

What is the difference between conduction and convection?

Back

Conduction is heat transfer through direct contact, while convection is heat transfer through the movement of fluids.

Front

What is an insulator?

Back

An insulator is a material that does not conduct heat well, such as rubber, wood, or glass. It slows down heat transfer.

Front

What is a conductor?

Back

A conductor is a material that allows heat to pass through easily, such as metals like copper and aluminum.