Heat Transfer: Conduction, Convection, Radiation

Front

What is heat transfer?

Back

Heat transfer is the movement of thermal energy from one object or substance to another due to a temperature difference.

Front

What are the three main types of heat transfer?

Back

The three main types of heat transfer are conduction, convection, and radiation.

Front

Define conduction.

Back

Conduction is the transfer of heat through direct contact between materials, where heat moves from the hotter object to the cooler one.

Front

Give an example of conduction.

Back

An example of conduction is a metal spoon getting hot when placed in a hot cup of coffee.

Front

Define convection.

Back

Convection is the transfer of heat in fluids (liquids and gases) through the movement of the fluid itself, where warmer parts rise and cooler parts sink.

Front

Give an example of convection.

Back

An example of convection is warm air rising and cold air sinking, creating wind.

Front

Define radiation.

Back

Radiation is the transfer of heat in the form of electromagnetic waves, which can occur in a vacuum.

Front

Give an example of radiation.

Back

An example of radiation is feeling the warmth of the sun on your skin.

Front

What happens to molecules when they are heated?

Back

When molecules are heated, they move faster and spread apart, causing the substance to expand.

Front

What is the relationship between molecular movement and temperature?

Back

The quicker a molecule moves, the warmer it is; the slower a molecule moves, the colder it is.