Heat Transfer Practice

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, like when a metal spoon gets hot after being placed in a pot of boiling water.

Front

What is convection?

Back

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

Front

What is radiation?

Back

Radiation is the transfer of heat energy through electromagnetic waves. It does not require a medium to travel through, which is why you can feel the warmth of the sun even in space.

Front

Give an example of conduction.

Back

An example of conduction is when you touch a hot stove and feel the heat transfer to your hand.

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 a campfire from a distance.

Front

What happens to an ice cube on a hot surface?

Back

The ice cube melts due to conduction, as heat from the hot surface transfers to the ice.

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

How does a lava lamp work?

Back

A lava lamp works through convection; the colored liquid heats up, becomes less dense, rises, cools down, and then sinks again.

Front

What is the difference between conduction and convection?

Back

Conduction is heat transfer through direct contact, while convection is heat transfer through the movement of fluids.