Heat Transfer: Conduction, Convection, Radiation

Front

What is heat transfer?

Back

Heat transfer is the movement of thermal energy from one object or substance to another due to a temperature difference.

Front

What are the three main modes of heat transfer?

Back

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

Front

Define conduction in the context of heat transfer.

Back

Conduction is the transfer of heat through a solid material without any movement of the material itself, typically occurring through molecular collisions.

Front

What is convection and how does it occur?

Back

Convection is the transfer of heat through a fluid (liquid or gas) caused by the movement of the fluid itself, often due to differences in temperature and density.

Front

Explain radiation as a mode of heat transfer.

Back

Radiation is the transfer of heat in the form of electromagnetic waves, such as infrared radiation, and does not require a medium to travel through.

Front

How does temperature affect molecular movement?

Back

The quicker a molecule moves, the warmer it is; higher temperatures correspond to increased molecular motion.

Front

What happens to ice when held in a warm hand, and why?

Back

The ice begins to melt due to conduction, as heat is transferred from the warmer hand to the colder ice.

Front

Describe an example of convection in everyday life.

Back

An example of convection is the warm air rising from a heater, which creates a circulation pattern in the room.

Front

What is the role of the Gulf Stream in heat transfer?

Back

The Gulf Stream is a warm ocean current that transfers heat from the equator to the northern latitudes, influencing climate.

Front

How does heat transfer occur in a vacuum?

Back

In a vacuum, heat transfer occurs only through radiation, as there are no particles to conduct or convect heat.