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Is it true that mantle rises in convection currents because heated materials more dense?

April 26, 2017convection currents dense heated Mantle Materials rises

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Is it true that mantle rises in convection currents because heated materials more dense?

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Actually, heated materials are less dense. When heat is applied to a substance such as liquid, it becomes less dense. It is this less dense and heated material that rises because it weighs less. The part of the mantle that is more dense would be any substance that is cooling and is sinking down.