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CONVECTION
The flow of mantle effects convection currents in the mantle. This process happens as hot material within the mantle begins to rise. As it rises, it begins to cool and then sinks. This process repeats as a cycle of convection currents.
Mantle convection causes the tectonic plates of the Earth to move slowly. Mantle convection is when heat moves from the mantle to the surface and causes the mantle, and the tectonic plates to move very slowly.
It's mantle with less, then mantle with more as you go deeper into earth.
You'll find the rather complete answer in the Related Link below
CONVECTION
Because they "float" on the mantle and the mantle undergoes a process of convection.
The flow of mantle effects convection currents in the mantle. This process happens as hot material within the mantle begins to rise. As it rises, it begins to cool and then sinks. This process repeats as a cycle of convection currents.
slab-pull and ridge-push
convection currents
The way the mantle circulates is through the process of convection. It refers to the transfer of heat from the Earth's core to the surface.
Mantle convection causes the tectonic plates of the Earth to move slowly. Mantle convection is when heat moves from the mantle to the surface and causes the mantle, and the tectonic plates to move very slowly.
"subduction"
Convection. It consists of heated magma rising, then cooling, sinking, and reheating constantly in the mantle.
convection
The lower mantle convection