What are convection currents...

asked Jan 2 in Geography by stelmachtyler12
What are convection currents

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answered Jan 2 by anonymous
Breifly, a convection current is a current in a fluid that results from convection.
But, in more detail: 
Convection is one of the three main types of heat transfer, the other two being conduction and radiation. Unlike the other two, convection can only happen in fluids,- liquids and gases. This is because the molecules have to be free to move.

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, and thencurrents (movements) are created in the fluid. 

answered May 21 by Loren
Thanks for shgainr. What a pleasure to read!

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