Conduction, Convection, Radiation

Front

What happens to water molecules when they are heated by the sun?

Back

They increase their kinetic energy and start to evaporate.

Front

In which direction does heat move?

Back

From hot to cold.

Front

How does the kinetic energy of van B compare to van A after being parked in the sun for 8 hours?

Back

Van B has higher kinetic energy.

Front

What is the heat transfer process when a hot metal ball is dropped onto a block of ice?

Back

Heat is transferred from the hot metal ball to the cold ice.

Front

What type of heat transfer is demonstrated by a heat lamp used for a lizard?

Back

Radiation.

Front

Define conduction in the context of heat transfer.

Back

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

Front

What is convection and how does it occur?

Back

Convection is the transfer of heat through the movement of fluids (liquids or gases) caused by differences in temperature and density.

Front

Explain the principle of radiation in heat transfer.

Back

Radiation is the transfer of heat in the form of electromagnetic waves, which can occur in a vacuum.

Front

What is the role of kinetic energy in heat transfer?

Back

Kinetic energy is the energy of motion; as temperature increases, the kinetic energy of molecules increases, leading to heat transfer.

Front

How does temperature affect the rate of heat transfer by conduction?

Back

The greater the temperature difference between two objects, the faster the rate of heat transfer by conduction.