Heat Transfer

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 when a metal spoon gets hot after being placed in a pot of hot soup.

Front

Define convection.

Back

Convection is the transfer of heat through the movement of fluids (liquids or gases) caused by differences in temperature and density.

Front

Give an example of convection.

Back

An example of convection is the way warm air rises and cool air sinks in a room, creating a circulation of air.

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 the density of a fluid when it is heated?

Back

When a fluid is heated, its density decreases, causing it to rise.

Front

What is the role of density in convection?

Back

In convection, differences in density due to temperature changes cause fluids to move, creating convection currents.