Heat Transfer

Front

What is conduction?

Back

Conduction is the transfer of heat through direct contact between objects that touch.

Front

What is convection?

Back

Convection is heat transfer through moving liquids and gas molecules, where hot rises and cold sinks.

Front

What is radiation?

Back

Radiation is the transfer of heat in the form of electromagnetic waves, such as heat from the sun.

Front

Example of conduction:

Back

Touching a hot stove and feeling the heat.

Front

Example of convection:

Back

Hot water rising and cold water sinking in a boiling pot.

Front

Example of radiation:

Back

Heat from the sun warming a swimming pool.

Front

What happens to hot air?

Back

Hot air rises because it is less dense than cold air.

Front

What happens to cold air?

Back

Cold air sinks because it is denser than hot air.

Front

How does a thermos keep drinks hot?

Back

A thermos uses insulation to reduce heat transfer by conduction, convection, and radiation.

Front

What is an example of heat transfer in a home?

Back

Using a radiator to heat a room through convection.