(RETEACH) Unit 4: Thermal Energy & Equilibrium

Front

What is convection?

Back

Convection is the process by which hot liquid or air expands, becomes less dense, and rises, while cooler, denser liquid or air sinks.

Front

How does thermal energy move in a closed room with a hot radiator?

Back

Thermal energy moves through convection.

Front

What is radiation in the context of thermal energy?

Back

Radiation is energy that travels as electromagnetic waves or rays through space between objects and materials.

Front

How does an iron transfer heat to clothes?

Back

An iron transfers heat to clothes through conduction.

Front

What is conduction?

Back

Conduction is the transfer of heat through direct contact between materials.

Front

What is the role of density in convection?

Back

In convection, hot fluids become less dense and rise, while cooler fluids become more dense and sink.

Front

What are the three main methods of heat transfer?

Back

The three main methods of heat transfer are conduction, convection, and radiation.

Front

How does radiation differ from conduction and convection?

Back

Radiation does not require a medium to transfer heat, while conduction and convection do.

Front

What is an example of convection in everyday life?

Back

An example of convection is the heating of air in a room by a radiator.

Front

What happens to the temperature of air near a heat source?

Back

The temperature of air near a heat source increases, causing it to become less dense and rise.