The causes of convection currents in the mantle is due to Heat from the core and the mantle itself cause convection currents in the mantle.
A convection current is describe as the flow that transfers heat within a fluid, the Heating and cooling of the fluid, changes in the fluid density. The force of gravity often comes together to set convection currents in motion.
Convection currents is formed via heating and cooling of the fluid which changes in the fluid density with the hand of the force of gravity. The currents take place in the core and the mantle.
In the Convection Currents in the Mantle
Heat in the mantle is brought about from the Earth's molten outer core, decay of radioactive elements and, in the upper mantle, friction from descending tectonic plates.
Conclusively, the Convection currents is created due to heated fluid expansion and becoming less dense.
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