Radiation, convection, conduction

Front

What is conduction?

Back

Conduction is the transfer of heat through direct contact between materials. It occurs when faster-moving particles collide with slower-moving particles, transferring energy.

Front

What is convection?

Back

Convection is the transfer of heat through the movement of fluids (liquids or gases). It occurs when warmer, less dense fluid rises and cooler, denser fluid sinks, creating a circulation pattern.

Front

What is radiation?

Back

Radiation is the transfer of energy through electromagnetic waves. It does not require a medium, so it can occur in a vacuum, such as the heat from the sun reaching the Earth.

Front

How does heat transfer occur in conduction?

Back

Heat transfer in conduction occurs when two objects at different temperatures are in direct contact, allowing thermal energy to flow from the hotter object to the cooler one.

Front

What is an example of conduction?

Back

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

Front

What is an example of convection?

Back

An example of convection is boiling water; as the water at the bottom heats up, it rises to the top, while cooler water descends to take its place.

Front

What is 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 heat when hot and cold water are mixed?

Back

Heat from the hot water transfers to the cold water until both reach the same temperature.

Front

What direction does heat move?

Back

Heat moves from warmer areas to cooler areas until thermal equilibrium is reached.

Front

What is thermal equilibrium?

Back

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