UNIVERSE
PLANETARY INTERIORS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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crust
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mantle
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outer core
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inner core
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Detailed explanation-1: -The aesthenosphere (70 250 km) is part of the mantle, the middle sphere of the Earth that extends to 2900 km. Convection currents in the magma drive plate tectonics. Heat generated from the radioactive decay of elements deep in the interior of the Earth creates magma (molten rock) in the aesthenosphere.
Detailed explanation-2: -The main heat transfer mechanism in the Earth’s mantle is convection, a thermally driven process where heating at depth causes material to expand and become less dense, causing it to rise while being replaced by complimentary cool material that sinks.
Detailed explanation-3: -Under the rigid layer of rock we live on, the Earth’s asthenosphere is like dense plastic. Because of its fluid-like properties, mantle convection can occur.