Earth Magnetism...the undefined truth....

                                     Earth Magnetism

Today I while sitting at the terrace, enjoying the monsoon rains, the most irritating 6th grade creature "Mr. question mark" appeared. Very next moment his question was.... Why do earth behave as a magnet?......

 HELL.....Their are two reason why i didn't like the question...1st . Its the answer you get in the class 6th science copy....2nd. I don't like his nose....

"TELL ME WHY???"...i had no option, but to start........ but what turned out at last, was shocking and astonishing....lets begin...

Reasons for Earth Magnetism, from history up to present....

                                      

                                       1.The Giant Bar Magnet

 The most ancient and old theory says that, below the surface of the earth, their is a big bar magnet having size near to the length of the earth, and is very powerful. Hence the magnetic field around the earth is actually due to this bar magnet. This magnet south pole is towards the north pole of the earth and its north pole is towards the south pole of the earth. It is due to this reason that the compass magnetic needle shows the direction. But after the advancement of the science, this theory was proven wrong, and a new theory emerged, which ruled over 200 years.

 

                                             2.The Molten Metal Theory

This theory was really promising and was really scientific too. According to this theory, the earth magnetism is due to the molten metal present at the core of the earth. In the picture the most center part is shown, that is what the core is. Now this core circulates like or rotates like if we stir the milk in glass with a spoon. It is due to this motion of the molten metal, that acts like a electron revolving in their orbital, which causes magnetism. If the direction of the motion is reversed the pole on the earth would be reversed!!!. This theory was widely accepted till recent years until some free - sitting scientist thought of increasing the science course a para more....

 

 

                                 

 

                                        3.The ionized Atmosphere theory

Up till where I know, this is the latest and still under-check theory. It says that earth magnetism isdue the atmosphere of earth. The atmosphere contains different layer, one of which is full of ionized gases. According to scientist, this layer covers the whole earth uni formally, and we know that ions carry charge and hence produce some electricity which in turn produces the magnetic phenomenon called electro - magnetic inductance, and hence behaves as blanket of a magnet over the earth, it is due to this reason due to which earth poses magnetic fields.   

                                 What is the need of magnetic fields?????

                                                 The Solar Winds

I know that ideas such as knowing directions and telecommunication maybe your probable answers. But don't forget, this website shares only those information that are rare to find....The answer to your question is the solar winds.

Solar winds are the waves of flames that our suns releases at regular interval of time. These flames have the capability to melt away the earth, so how does it is still unaffected?? The answer is the earth magnetic field that do not allow these flares to enter the earth atmosphere, if the field intensity is lowered, the heat increases drastically, as seen as a effect of global warming. See the image for better understanding.

 

I hope by now you would have got some ideas on the earth magnetism, please do leave your comments....