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 hot soup.

Front

What is convection?

Back

Convection is the transfer of heat by the movement of fluids (liquids or gases). It involves the rising of warm fluid and sinking of cooler fluid, creating a circulation pattern, like warm air rising in a room.

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, which is why we can feel the warmth of the sun even though it is millions of miles away.

Front

Give an example of conduction in everyday life.

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 in everyday life.

Back

An example of convection is the way warm air rises from a heater and circulates around a room.

Front

Give an example of radiation in everyday life.

Back

An example of radiation is feeling the warmth of a campfire from a distance.

Front

What happens to the temperature of an ice cube when it melts on a hot surface?

Back

The temperature of the ice cube increases as it absorbs heat from the hot surface, causing it to melt.

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 demonstrate convection?

Back

In a lava lamp, the colored liquid heats up, becomes less dense, rises, cools down, and then sinks, creating a continuous flow.

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.