Conduction, Convection, & Radiation

Front

What is conduction?

Back

Conduction is the transfer of heat through direct contact between materials. It occurs when heat moves from a hotter object to a cooler one through molecular collisions.

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 areas of a fluid rise and cooler, denser areas sink, creating a circulation pattern.

Front

What is radiation?

Back

Radiation is the transfer of heat in the form of electromagnetic waves. It does not require a medium to travel through, allowing heat to be transferred through empty space.

Front

Give an example of conduction in everyday life.

Back

An example of conduction is when a metal spoon is heated by being placed in a hot pot of soup.

Front

Give an example of convection in everyday life.

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 in everyday life.

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

How does conduction occur in solids?

Back

In solids, conduction occurs as heat energy is transferred from one molecule to another through direct contact, causing the molecules to vibrate and pass on their energy.

Front

How does convection occur in liquids?

Back

In liquids, convection occurs when warmer liquid rises to the top, while cooler liquid sinks, creating a flow that transfers heat throughout the liquid.

Front

What is the role of insulation in heat transfer?

Back

Insulation reduces heat transfer by conduction, convection, and radiation, helping to keep heat in or out of a space.

Front

What happens to the temperature of a substance during conduction?

Back

During conduction, the temperature of the hotter substance decreases while the temperature of the cooler substance increases until thermal equilibrium is reached.