Thermal convection in the Earth's mantle is caused by the fact that the deeper parts are hotter and therefore less dense than the surface parts. This in turn is caused because the surface of the Earth loses heat to space by radiation, and is therefore cooled, while the central parts (a) retain some heat from the gravitational and kinetic energy released by the accretion of the Earth from planetismals and (more significantly), (b) are continually heated by
This thermal convection also drives hot-spot vulcanism.
Convection in the mantle causes the plates to move.
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an unequal distribution of heat
an unequal distribution of heat By: (FINALLY NOT A TROLL ANWSER)
convection cells in the mantle
Originally conceived as "continental drift," the theory of plate tectonics explains the motion of Earth's landmasses. However, there is still much debate as to what drives this motion. Explanations include upper mantle convection currents, forces due to gravity, and the effect of the Earth's rotation.
Heating from the Earth's core drives convection in the upper mantle. This convection is extremely slow; the speed with which material in the Earth's crust spreads from the mid-ocean ridges is of the order of several cm per year. Nevertheless, it is evident that the same forces which drive convection in the atmosphere and in the ocean are present in the "solid" earth as well. Mantle convection is the slow creeping motion of Earth's solid silicate mantle caused by convection currents carrying heat from the interior of the Earth to the surface. Mantle convection is the slow creeping motion of Earth's solid silicate mantle caused by convection currents carrying heat from the interior of the Earth to the surface.
an unequal distribution of heat
an unequal distribution of heat By: (FINALLY NOT A TROLL ANWSER)
convection currents
mantle convection
convection cells in the mantle
Mantle convection is the slow creeping motion of Earth's rocky mantle caused by convection currents carrying heat from the interior of the earth to the surface. It is the driving force that causes tectonic plates to move around the Earth's surface.
The transfer of heat (therms) through fluid (including air) motion.
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Yes both on the macroscopic scale (convection) and the microscopic scale (thermal motion). Everthing above zero Kelvin (absolute zero) has thermal motion.
Convection, where the transfer of thermal energy it occurs by the actual movement of the heated air in a circular motion.
Convection, where the transfer of thermal energy it occurs by the actual movement of the heated air in a circular motion.
Originally conceived as "continental drift," the theory of plate tectonics explains the motion of Earth's landmasses. However, there is still much debate as to what drives this motion. Explanations include upper mantle convection currents, forces due to gravity, and the effect of the Earth's rotation.