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Pie
3 years ago
15

What causes convection currents in earth's mantle?

History
2 answers:
Y_Kistochka [10]3 years ago
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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Answer:

<h2>Containment</h2>

Explanation:

The policy of containment focused on keeping communism and the Soviet Union's influence limited, rather than by trying to confront the Soviet Union directly or eliminate communism completely.  It influenced US foreign policy by prompting intervention in places like Korea to stop the spread of communism.

George F. Kennan recommended the policy of containment which set the tone for US involvement in world relations following World War II.  Kennan was an American diplomat in Moscow after World War II.  In 1946, he sent what became known as "the long telegram" of his advice about what the USA needed to do about the Union of Soviet Socialist Republics (USSR).

People feared a direct confrontation between the USA and the USSR.  Kennan advised not pushing the conflict too much, but instead just try to "contain" the Soviet Union and wait for their system to collapse under the weight of its own problems.

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Answer:

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3 years ago
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