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

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, and does not require a medium.

Front

How does convection work in a room?

Back

In a room, warmer air rises because it is less dense, while cooler air sinks, creating a convection current.

Front

What happens to ice when held in a warm hand?

Back

The ice melts due to conduction, as heat from the hand transfers to the ice.

Front

Explain why a fireman feels heat when touching a hot door.

Back

The fireman feels heat due to conduction, as thermal energy transfers from the hot door to his hand.

Front

What is the direction of heat flow in heat transfer?

Back

Heat always flows from the hotter object to the colder object.

Front

Give an example of convection in everyday life.

Back

An example of convection is the rising of warm air from a heater, which circulates throughout the room.