#127 (Q) Heat transfer

Front

What is heat transfer?

Back

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

Front

What are the three main types of heat transfer?

Back

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

Front

Define conduction.

Back

Conduction is the transfer of heat through direct contact between materials, where heat moves from the hotter object to the cooler one.

Front

Define convection.

Back

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

Front

Define radiation.

Back

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

Front

Example of conduction in everyday life?

Back

An example of conduction is when a metal spoon gets hot after being placed in a pot of boiling water.

Front

Example of convection in everyday life?

Back

An example of convection is the warm air rising from a heater, causing the cooler air to move down and create a circulation.

Front

Example of radiation in everyday life?

Back

An example of radiation is feeling the warmth of the sun on your skin, even when standing in the shade.

Front

What happens to warm air in a room?

Back

Warm air rises because it is less dense than cooler air, leading to convection currents.

Front

How does a campfire warm people around it?

Back

A campfire warms people through radiation, as the heat radiates outwards from the flames.