Question

Hello jii
Distinguish between the upper and the lower mantle.
in 80 words
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Answer 1

Answer:

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☯ The mantle resides beneath the crust. This region makes up roughly 84 percent of the Earth. The crust and part of the upper mantle move around due to convection from heat in the Earth’s interior. This is called plate tectonics. This movement of tectonic plates causes earthquakes and forms mountains. Heat is generated from the radioactive decay of elements deep inside the Earth. Over time, this convective action changed the arrangement of continents. The gradual rising and falling of material in the mantle can bring forth magma through erupting volcanoes. Between the upper mantle and the core lies the lower mantle.

☯ Beneath the lower mantle, the core makes up the Earth’s center and contains mostly iron and nickel. Its outermost layer is liquid, but its innermost layer is solid due to incredible pressure. This core is thought to rotate more quickly than other layers of the planet. It is also presumed to consist mainly of iron, but new discoveries reveal strange behavior of minerals. Scientists think the source of the Earth’s magnetic fields arises from the convective action of the molten outer core, which could displace flowing electric currents.

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