Heat Transfer Review

Front

What is convection?

Back

Convection is the transfer of heat through the movement of fluids (liquids or gases). It occurs when warmer areas of a liquid or gas rise and cooler areas sink, creating a circulation pattern.

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 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 from the sun to reach the Earth.

Front

What are the three ways heat can transfer?

Back

The three ways heat can transfer are conduction, convection, and radiation.

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

How does a microwave heat food?

Back

A microwave heats food through radiation, using electromagnetic waves to excite water molecules in the food, causing them to heat up.

Front

What happens to liquids in a lava lamp when heated?

Back

In a lava lamp, the colored liquids heat up, become less dense, and rise to the top, demonstrating convection.

Front

What is an example of conduction?

Back

An example of conduction is touching a hot stove and feeling the heat transfer to your hand.

Front

How does the sun's heat reach the Earth?

Back

The sun's heat reaches the Earth through radiation, traveling through the vacuum of space.

Front

What is the role of density in convection?

Back

Density plays a key role in convection; warmer fluids are less dense and rise, while cooler fluids are denser and sink.