Conduction, Convection, and Radiation

Front

What is conduction?

Back

Conduction is the transfer of thermal energy through direct contact between materials. Heat moves from the hotter object to the cooler one.

Front

What is convection?

Back

Convection is the transfer of thermal energy through the movement of fluids (liquids or gases). Warm air or liquid rises, while cooler air or liquid 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, like how the sun's energy reaches Earth.

Front

How does a hot air balloon rise?

Back

A hot air balloon rises because the heated air inside the balloon is less dense than the cooler air outside, causing it to float.

Front

What is an example of convection in everyday life?

Back

An example of convection is boiling water. The hot water at the bottom rises to the top, while cooler water descends.

Front

What type of energy transfer occurs when you feel warmth from a fire?

Back

The warmth you feel from a fire is due to radiation, as heat is transferred through electromagnetic waves.

Front

What is the primary method of heat transfer in solids?

Back

The primary method of heat transfer in solids is conduction.

Front

What happens to air when it is heated?

Back

When air is heated, it expands, becomes less dense, and rises.

Front

What is an example of radiation?

Back

An example of radiation is the heat from the sun warming your skin.

Front

What is the role of density in convection?

Back

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