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If heat is unevenly distributed in the mantle, what result does convectional current theory predict?

Answer and explanation

Correct answer: Slow but organized material movement will be possible

The direct answer is B: slow but organized material movement will be possible. Convection is movement caused by differences in temperature and density. Step by step: heat is unevenly distributed in the mantle; warmer material becomes less dense and tends to rise; cooler material becomes denser and tends to sink; this rising and sinking can form convection cells; the movement is gradual and organized rather than an instant, uncontrolled event. Such movement was proposed as a mechanism that could help explain large-scale motions connected with continental drift, although modern plate tectonics gives the fuller explanation. Option A is wrong because mantle convection does not stop Earth’s rotation. Option B is correct because it describes the expected slow circulation of mantle material. Option C is wrong because mantle heat does not make all oceans dry up. Option D is wrong because the theory concerns movement inside Earth, not only atmospheric storms. Memory cue: unequal heat produces rise, sink and circulation.

Related tags

Uneven HeatConvection CellMantle Movement

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