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 methods of heat transfer?

Back

The three main methods of heat transfer are 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 infrared radiation.

Front

How does a microwave oven heat food?

Back

A microwave oven uses radiation to heat food by exciting water molecules in the food.

Front

What happens to warm air in a room?

Back

Warm air rises because it is less dense than cooler air, demonstrating convection.

Front

In heat transfer, from where does heat flow?

Back

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

Front

What is required for conduction to occur?

Back

Conduction requires direct contact between materials.

Front

What is an example of convection in everyday life?

Back

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