what is convection current

(geophysics) Mass movement of subcrustal or mantle material as the result of temperature variations. A. Eikhenval’d (1903).All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. Convection currents are the movement of fluid as a result of differential heating or convection. From the viewpoint of electron theory, any transfer of charges is, in the final analysis, due to the convection (or movement) of charged microparticles.

Warm air isless dense than cool air, so it rises. This creates wind. These are convergent (destructive), divergent (constructive) and … Convection is a bulk gas-flow process that can be distinguished from both diffusion and viscous flow. the transfer of electric charges by the movement of a charged macroscopic body. For instance, when you boil a pot of water, you are essentially heating the pot of water through conduction as the heat source is in direct contact with the pot. Wind is an example ofa convection current. Heat can be transferred through conduction which is basically by the virtue of touch or being in contact. A simple example of convection currents iswarm air rising toward the ceiling or attic of a house. In the case of the Earth, convection currents refer to the motion of molten rock in the mantle as radioactive decay heats up magma, causing it to rise and driving the global-scale flow of magma.. The cold air gets heated up and rises creating a cycle of heated air rising up and cold air taking its place. Convection currents also result in precipitation, including snowfall. A convection current forms when the plasma rises and the cooled plasma descends. Convection currents occur within: the geosphere – plate tectonics. The process then repeats. Convection currents are present everywhere, from the atmosphere to magma within the plates. The motion that results from the continual replacement of the heated fluid in the vicinity of the heat source by the cooler fluid nearby is called a natural convection current, and the mass and heat transfer that is enhanced as a result of this natural convection current is called natural convection mass and heat transfer. Convection current develops in the mantle of the earth due to the repeated heating and cooling cycles of the magma. The basic principle of a convection current is that warm air rises because of the extra energy it received in the form of heat and cold air falls because of the low energy state. Convection often stems from conduction. When the heated molecules cool down in the absence of a heat source, they would move down allowing the heated molecules at the bottom to rise up.This movement of hot and cold molecules will create a current and this is known as convection current.Convection current develops in the mantle of the earth due to the repeated heating and cooling cycles of the magma. Whereas gas diffusion involves the statistical motion of atoms and molecules driven by concentration gradients, convection arises from the response to gravitational, centrifugal, electric, and magnetic forces. Convection currents develop in the atmosphere as well resulting in the formation of winds and clouds. There are three main types of plate boundary. Once the water gets heated up, the hot molecules of water rise up forcing the dense cold molecules of water on top to move down. the hydrosphere - ocean currents. In Conclusion, Convection is the transfer of energy through molecules. Focus Question: What is the source of energy for convection currents in the geosphere? This explains the complete identity between the magnetic properties of convection current and a conduction current (that is, the ordered movement of electrons, ions, and other particles relative to a body), which was established by the experiments of the American physicist G. Rowland (1879) and the Russian physicist A.

This transfers heat. Plate Margins. Convection is a major factor inweather. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional.https://encyclopedia2.thefreedictionary.com/Convection+CurrentThe time rate at which the electric charges of an electron stream are transported through a given surface.Mass movement of subcrustal or mantle material as the result of temperature variations.Any current of air involved in convection; usually, the upward-moving portion of a convection circulation, such as a thermal or the updraft in cumulus clouds. This also acts as the foundation of the plate or tectonic movements. Outside the core is a radiation zone where plasma moves. Convection of a star - A star has a convection zone where energy is moved by convection. Also known as convective current.The transfer of heat that results from the movement of air from one location to another, usually as a result of a stream of air produced by thermal [12] Soundalgekar, V.M., Effects of mass transfer and free The effects of the permeability parameter (K) and free He thumbs a button and another particle comes into being, tracing helical Then somebody at the table next to you lights up a cigarette and the This primary structure carries purlins and rafters in the normal way, with the rafters strutted at the same angle as the struts on the tied portals, creating in effect an inverted ridge that acts as a continuous lantern because, above it, the real ridge is defined by a motorized greenhouse glazing system that can be thrown open on hot days to encourage cooling In addition, temperature differences between day and night are small and so there are no

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