How is heat energy transferred, and what factors affect the rate at which heat energy is transferred?

Revisison for how heat energy is transferred and what affects the rate at what it is transferred.

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How heat energy is transferred.

Heat transferr is where heat energy is transferred from a hotter mass to a cooler mass. It can be transferred by conduction, convection and radiation.


Heat can movethrough a substance because of Conduction. Metals are good conductors, whereas non-metals and gases are bad conductors, which are called Insulators.Heat energy is transferred from the hot end of an object to the cold end. As the atoms get hotter, they are energised and they vibarate more. The vibaration is passed through the object, engergising every atom. This is conduction.


Convection occurs when atoms with a lot of heat energy in a liquid or gas, move and take the place of atoms with less heat energy. This is another way of heat transferr. This is convection.


All objects give out and take in thermal radiation. This is also known as infra-red radiation. No particles are involved this way, unlike conduction and convection, which means that radiation can also happen in Space. This is why we can feel the heat of the Sun.

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