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3 years ago

What causes convection currents in earth's mantle?

2 answers:

3 0

Convection currents in earths mantle are caused by the rise of hot material rising towards the crust, becoming cooler and sinking back down.

Trava [24]3 years ago

3 0

Answer:

Heat energy from the earth's core

Explanation:

The earth is comprised of hot molten rock materials in its extreme interior. These are dense materials namely iron, nickel and some other siderophile elements are also present. They are mostly the alloys of iron and nickel. The temperature at the core is about 6000°C. This heat energy is radiated from the interior of the earth towards the outer layers, as a result of which the convection currents are generated in the mantle. This convection current is responsible for the drifting of the lithospheric plates over the less dense layer of asthenosphere.

These plates when floats over the asthenosphere shares the following type of plate boundaries, namely-

(1) Divergent plate boundary

(2) Convergent plate boundary

(3) Transform plate boundary

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