Convection Current

Convection  Current

Convection current condition in the mantle zone seems to cause Plate motion. This is thought to be  slow displacement or Convection of a mental material under the action of temperature difference between its floor and the roof. As the rocks are heated deep in the earth they become less dance and rise to spreading ridges. As the rocks move litelitera,  they cool, becoming dense enough to sink at subduction zones.

 

A Convection Current is a process which involves the movement of energy from one place to another and the meaning of Convection is "heat transfer". It is also called to as convection heat transfer.Heat energy can transfer by convection when there is a significant difference in temperature between two parts of a fluid. When this temperature difference exists, hot fluids rise and cold fluids sink. Convection that occurs naturally is called natural convection or free convection. If a fluid is circulated using a fan or a pump, it's called forced convection. The cell formed by convection currents is called a convection cell.

Convection Current Hypothesis

The hypothesis suggests that the mountain range were initiated and developed due to the convection currents supported to the exist in the plastic - type mental blow the crust of the earth. The origin of the currents may be due to very hot liquid core of the Earth. Some phenomena of convection currents are given below :

• Convection currents  travel horizontally under the crust of the Earth.
• In the journey of convection currents, they pull along the light material of the continental margins and in the process themselves become cold and heavy.
• Thus,  two types of convection currents come into play forming almost cycle:  first - the ascending currents of light and hot material, and second the descending current of heavy and a cold material.
• In the Divergent plate boundaries, if the Ascending  rising limb of convection current beneath the earth's crust volcanic arc were formed.
•  In the  convergent plate boundaries,  if the descending limb of convection current beneath the earth's crust mountain building were formed.

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 Related Links
Plate Tectonic Theory

Movements of Plates

 
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