Conduction, Convection, and Radiation

Front

What is conduction?

Back

Conduction is the transfer of thermal energy through direct contact between materials. It occurs when heat moves from a hotter object to a cooler one.

Front

What is convection?

Back

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

Front

What is radiation?

Back

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

Front

Example of conduction:

Back

An ice cube melting in a person’s hand.

Front

Example of convection:

Back

Using a blow dryer to dry your hair.

Front

Example of radiation:

Back

The sun heating water in a swimming pool.

Front

How does a hot spoon help scoop ice cream?

Back

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

Front

What happens when raw egg is placed on black pavement on a hot day?

Back

The pavement will conduct the heat and cook the egg.

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 thermal energy transfer in a furnace?

Back

A furnace heating the air in a school is an example of convection.