There are six sources of raw materials for the production of magnesium: magnesite, dolomite, bischofite, carnallite, serpentine and sea water.These sources differ in the magnesium content, in production methods, and in their origin.Some are mined from mines, some in open mining, others originate in various processes carried out on sea water and salt lakes, and another material originates from the waste of the asbestos production process.agnesium Extraction From Sea Water. The history of elementary magnesium started in 1755,when Joseph Black, a Scottish chemist, discovered that magnesia contained a new element, magnesium.
magnitude definition: Magnitude is defined as large in size or very important. (noun) An example of magnitude is the depth of the Grand Canyon. An example of magnitude is the size of the problem of world hunger. ...
Intensity. 1. The power or magnitude of light, heat, or whatever else you might analyze in physics class. Intensity is inversely proportional to the square of distance from the source. 2 (a) Excessive and mindless enthusiasm for an activity which is often trivial or pointless. This concept was coined by a group of students from radnor high school when they were bored during gym class.