Convection currents occur when materials become heated and less dense -- they become buoyant. buoyant materials, such as continents or hot rocks or hot water or hot air:
a) tend to float on denser material or to rise up through denser rock or water or air.
b) tend to resist any kind of motion.
c) tend to sink into denser materials.
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Convection currents occur when materials become heated and less dense -- they become buoyant. buoyan...
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