Some observers have suggested that as cognitive psychology became a movement during the 1970s, the intricacies of the phenomena and processes it examined meant it also began to lose cohesion as a field of study.
Iron has a melting point of 1535.0 degrees Celsius or 2795.0 degrees Fahrenheit. It has a boiling point of 2750.0 degrees Celsius or 4982.0 degrees Fahrenheit. Continue Reading.
After a few hundred million years the temperature of Earth reached 2,000C - the melting point of iron - and Earth's core was formed. At this point much of the Earth was molten and there may have been a magma ocean at the surface. Gradually the Earth cooled and the planet settled out into a core, mantle and crust.