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 a solid material without the movement of the material itself, typically occurring in solids.

Front

Define convection.

Back

Convection is the transfer of heat through fluids (liquids and gases) caused by the movement of the fluid itself.

Front

Define radiation.

Back

Radiation is the transfer of heat in the form of electromagnetic waves, such as light, and does not require a medium.

Front

What happens to the molecules in a substance when it is heated?

Back

When a substance is heated, its molecules move faster and spread apart, causing the substance to expand.

Front

What is an example of conduction in everyday life?

Back

An example of conduction is when a metal spoon gets hot after being placed in a hot pot of soup.

Front

What is an example of convection in everyday life?

Back

An example of convection is the warm air rising from a heater and circulating around a room.

Front

What is an example of radiation in everyday life?

Back

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

Front

How does convection work in a hot air balloon?

Back

In a hot air balloon, the air inside the balloon is heated, causing it to rise because warm air is less dense than cooler air.