explain how convection. occurs
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Mantle convection is the slow creeping motion of Earth's rocky mantle caused by convection currents carrying heat from the interior of the earth to the surface. It is one of 3 driving forces that causes tectonic plates to move around the Earth's surface.
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When liquids and gases are heated, they expand and rise. The cooler liquid or gas moves down to take the place that was occupied by the warm liquid or gas. The cooler substance similarly gets heated up and rises. This process continues till the entire substance is heated.
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