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 methods of heat transfer?

Back

Conduction, convection, and radiation.

Front

Define conduction.

Back

Conduction is the transfer of heat through direct contact between materials.

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

Define radiation.

Back

Radiation is the transfer of heat in the form of electromagnetic waves, such as light or infrared radiation.

Front

What happens to air when it is heated?

Back

Warm air rises because it is less dense than cooler air.

Front

What happens to air when it cools?

Back

Cool air sinks because it is denser than warm air.

Front

How do molecules in hot substances behave compared to those in cold substances?

Back

Molecules in hot substances move more quickly than those in cold substances.

Front

What is an example of convection in everyday life?

Back

An example of convection is the warm air rising from a heater.

Front

What is an example of conduction in everyday life?

Back

An example of conduction is a metal spoon getting hot when placed in a pot of boiling water.