Heat Transfer Bell Ringers

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 in fluids (liquids and gases) through the movement of the fluid itself, where warmer, less dense areas rise and cooler, denser areas sink.

Front

Define radiation.

Back

Radiation is the transfer of heat in the form of electromagnetic waves, such as infrared radiation, which can occur in a vacuum.

Front

In heat transfer, heat always flows from which substance to which substance?

Back

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

Front

What happens to air when it is heated?

Back

When air is heated, it becomes less dense and rises, creating convection currents.

Front

How does a fireman feel heat from a hot door?

Back

A fireman feels heat from a hot door through conduction, as heat is transferred from the hot door to his hand.

Front

What is an example of convection in everyday life?

Back

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

Front

What is an example of conduction?

Back

An example of conduction is touching a metal spoon that has been sitting in a hot pot of soup; the heat transfers from the soup to the spoon to your hand.