Heat Transfer Review

Front

What is conduction?

Back

Conduction is the transfer of heat through direct contact between materials. It occurs when two objects at different temperatures touch each other.

Front

What is convection?

Back

Convection is the transfer of heat through the movement of liquids and gases. It occurs when warmer, less dense areas of a fluid rise and cooler, denser areas sink.

Front

What is radiation?

Back

Radiation is the transfer of heat in the form of electromagnetic waves. It does not require a medium, so it can occur in a vacuum.

Front

How many ways can heat move from one object to another?

Back

There are 3 ways heat can move: conduction, convection, and radiation.

Front

Give an example of conduction.

Back

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

Front

Give an example of convection.

Back

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

Front

Give an example of radiation.

Back

An example of radiation is feeling the warmth of the sun on your skin, even when you are not in direct contact with it.

Front

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

Back

When a substance is heated, its particles gain energy, move faster, and usually spread apart, causing the substance to expand.

Front

What is the role of density in convection?

Back

In convection, warmer fluids are less dense and rise, while cooler fluids are denser and sink, creating a cycle of movement.

Front

What is thermal equilibrium?

Back

Thermal equilibrium is the state in which two objects in contact reach the same temperature and no heat flows between them.