Heat is another form of energy.

Much of the heat energy comes from the sun.

Heat also comes from within the earth.

Heat drives many of earth's natural phenomena

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Heat

Humans use heat to power our industries and homes.

We are able to use heat properly by learning how heat is transferred

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Heat Transfer

Conduction is the transfer of heat through direct contact of molecules.

Metals are good conductors - they allow heat to move easily.

Insulators like rubber, wood, or plastic prevent heat from moving too fast.

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Conduction

Convection is the transfer of heat through fluid motion.

Convection is possible in liquids and gasses.

When fluids are heated, their molecules move faster and expand. They go up and down in a convection current.

Heat moves from hot to cold. In oceans for example, convection causes waves and currents.

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Convection

Radiation is the transfer of heat through waves.

In conduction, heat is transferred through contact of solids. In convection, it is transferred through liquids and gasses. In radiation, heat is transferred through empty space by electromagnetic waves.

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Radiation