Earth’s Magnetic Field Essay

Earths charismatic knowledge base is one of the creations nearly complicated features. It started to be observed in 1845 by a scientist named Carl Friedman Gauss (Sarfati). The magnetised stadium is gene prized inside of the res publicas spunk and there are many scientists who still debate everyplace how it was counterbalance created. There are also many arguments about the many changes that the empyrean has gone by dint of in its existence. These arguments are mostly any for a young- ball pattern or an erstwhile(a) earth model. History of the charismatic filedEarths magnetic reach is a expanse of electric car car authoritative that is conducted from the earths solid inner gist through the watery outer sum total (Richard). The electrical current goes about the earth and through it at the north and south celestial poles. The north pole was first discovered by James Ross in 1831 (nasa.gov). No one visited it once again until the early 1900s. In 1904, Roald A mundsen found the pole again and discovered that it had moveat least 50 km since the geezerhood of Ross, (nasa.gov). The north pole continued to move at an average of about 10 kilometers per socio-economic class in the twentieth century (nasa.gov). More recently scientist Larry Newitt of the Geological study of Canada has said that it has been moving an average of 40 kilometers every year (nasa.gov).The past tense of earths magnetic field burn down be analyse by past lava eruptions that confound hardened. When grains of the common magnetic mineral magnetic iron-ore in vol roll in the hayic lava or ash flows cool below its curie smudge of 570C (1060F), the magnetic domains partly align themselves in the perpetration of the earths magnetic field at that time. Once the disceptation has fully cooled, the magnetites alignment is fixed, (Sarfati). The Curie point of a substance is the temperature at which it loses its magnetism, so the lava must cool below this point before th e magnetite can align(Sarfati). Using these records scientists acquit seen that the earths pole have switched several times in the past.What the magnetic field actually does that is beneficial to the earth is deflect cosmic rays. The magnetic currents constrict them toward the north and south poles. The increase could knock out power grids, splutter the communications agreements on spacecraft, temporarily widen atmospheric ozone holes, and generate more(prenominal)(prenominal) aurora activity, (Roach). The effect that these cosmic rays would cause to humans are unfathomable though some think that they would cause tissue damage often like x-rays (Richard). It also reduces the emission of hundred 14 which makes the earth fitter (Humphreys). Magnetic field reversalsMagnetic field reversals occur when the currents of the the outer core of the earth move the electrical current around enough that it actually flips upside down. Many scientists believe that when the poles switch p laces there is a utmost of time where the magnetic field does not exist, but the University of California professor Gary Glatzmaier says It just gets more complicated, (nasa.gov). He states that when the poles are reverse there exit actually be multiple magnetic poles that appear all around the earth. A south magnetic pole might emerge over Africa, for instance, or a north pole over Tahiti,(nasa.gov).Earths magnetic field during a reversal (nasa.gov)Some old earth scientists believe that when poles reverse is caused by a second magnetic field coming into existence with an opposite polarity and it thusly overpowers the first. This head kit and caboodle if you assume that the geodynamo model is true because if the current of the still metal causes the magnetic field then the currents are can make a juvenile field easily (Richard). Once the first field decays the second takes over. different old earth scientists believe that when the polarity changes it is just the electrical current being shifted enough by the liquid outer core that it reverses circumspections sail throughly (nasa.gov). Both of these carry outes would take large amounts of time and since there is proof that there have been many reversals have occurred in the past, this is what old earth scientists can use as evidence that the earth is old (nasa.gov).Dr. Russell Humphreys accepted that reversals were real, distant some previous creationists. He proposed that the process of convection could cause the magnetic field to reverse (Humphreys). Most young earth scientists believe that most of the reversals occurred during a global inundation which occur in Genesis. Dr. John Baumgardner proposed that the Genesis discharge was caused by the plunging of tectonic plates (Sarfati). This would have made the outer parts of the liquid core to cool rapidly which would have sped up the process of convection. In this model reversals would have occurred once every week or two. The most stunning piec e of evidence for this is a very thin shape of lava that was found that most have cooled within a few days weeks and the magnetite of the outside of the layer is aligned in opposite direction as the inside (Sarfati).Origins of the fieldScientists that believe in the old-earth model have said that theres is about 300,000 years in in the midst of magnetic field reversals and that each reversal takes around 10,000 years to complete (Roach). The electrical current which makes the field has been said to be generated through convection. The liquid of the outer core which conducts the electrical current is constantly moving (Richard). This tendency is caused by the heating of the molten liquid by the inner core which causes it to rise and as soon as the liquid cools it will sink. This process is called convection (Richard). This idea that this process can generate an electric current is called the geodynamo model.young earth scientists strongly disagree with this. The first point that t hey make is that the geodynamo model has no significant evidence even after decades of research (Humphreys). one and only(a) proposed idea is that during creation God made atomic nuclei spin in the same direction (Humphreys). The spin of atomic nuclei creates a tiny magnetic field and if the spin of the atomic nulcei were aligned it would add up to a much larger field. Dr. Russell Humphreys who has a Ph.D. in physics says as caloric collisions disoriented the nuclear spins, the laws of electricity predict a startup of an electric current within the core of the earth to sustain the field.Genesis swamp model of earths magnetic field decay and reversals (Humphreys) field of study fluctuationsAs stated before, the magnetic field prevents some of the production of carbon 14. This also can be used to see the past of the field. This is a process called radiocarbon dating (Humphreys). Using this scientists have seen that the field has been increase and decreasing in strength over time. T hese fluctuations are what most old earth scientists use to say that the current ebb is no more than just a fluctuation and that it is not a steady decrease (Richard).The young earth rebuttal for this again goes back to the Genesis flood. In a summary of Dr. Russell Humphreys paper on the magnetic field fluctuations of states that because the liquid of the outer core disrupted the electrical current during the flood there would have been what he called higher-order components (Humphreys). This means that there four poles or eight poles, etc, and these poles would die away faster than the two main poles. The higher-order components can have either polarity, the strength of the field would fluctuate up and down, as different components died away at different rates.If the young earth scientists proposed idea of the exponential decay of the magnetic earth of the field is correct then the earth cannot be more than 10,000 years old (Sarfati). At the rate that the field is currently decre asing, which has been calculated with the formula i = Ie-t/, the field would have been strong enough to melt the earth if it had been in existence seven-day than 10,000 years (sarfati).ConclusionBoth of these groups of scientists have evidence that supports their main points. The earths magnetic field a very complicated system that has been around since the beginning of the earth. There has been much that scientists have learned from it and there are still many things that they have to learn about it.