7.8A Conduction, Convection, and 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

Give an example of conduction.

Back

An egg cooking in a frying pan is an example of conduction, as heat is transferred from the pan to the egg.

Front

What is convection?

Back

Convection is the transfer of heat through the movement of fluids (liquids or gases). It occurs when warmer areas of a liquid or gas rise and cooler areas sink.

Front

Give an example of convection.

Back

An example of convection is the way hot coffee cools down; the heat moves from the coffee to the air around it.

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.

Front

Give an example of radiation.

Back

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

Front

In heat transfer, heat always flows from which substance to which substance?

Back

Heat always flows from the hotter substance to the colder substance.

Front

What happens to the temperature of a substance when it absorbs heat?

Back

When a substance absorbs heat, its temperature increases.

Front

What is the role of insulation in heat transfer?

Back

Insulation reduces the rate of heat transfer between objects, keeping heat in or out.

Front

How does a pot get hot on a stove?

Back

A pot gets hot on a stove due to conduction, as heat is transferred from the stove to the pot.