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.

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, which can travel through a vacuum.

Front

What happens to a solid chocolate bar when held in your hand?

Back

The chocolate bar warms up and softens due to conduction, as heat is transferred from your hand to the chocolate.

Front

How does the sun warm a sunbather?

Back

The sun warms a sunbather through radiation, as heat travels in electromagnetic waves from the sun to the person.

Front

Why does warm air rise in a room?

Back

Warm air rises in a room due to convection, as it becomes less dense than cooler air.

Front

What is an example of conduction in everyday life?

Back

An example of conduction is when you touch a hot stove and feel the heat transfer to your hand.

Front

What is an example of convection in everyday life?

Back

An example of convection is the way warm air circulates in a room when a heater is on.