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The liquid or gas which transfers the heat

can circulate round and round between the hot and cold regions.

The flow of liquid or gas is called a convection current.

Convection currents are caused by changes in density.

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13y ago
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15y ago

currents caused by the motion of heated molecules

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15y ago

In geology, the Earth's convection currents are caused by the motion of heat from the Earth's interior.

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15y ago

Hotter material is less dense and rises. Cooler material is more dense and sinks. Together these cause vertical currents called convection currents.

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