世界上大约有45亿岁。一开始它的密度函数是线性的。年初以来世界质量失去它的热量。地球的热量足够高导致对流。对流就像电梯从中心到表面。这种对流使得地球内部质量向上移动,然后向下nonstoppingly,形成以来。这个运动中心边缘有1毫米/年平均速度。45亿年来,这个旅游完成了数千倍。故事发生部分熔融。大型离子/电荷在晶体结构元素是不必要的,他们离开第一晶体在熔化。 They are transferred to crust via this melt. Due to this repeatingly mass translation earth has been developing its layered structure with characterised by step function. The process is called differentiation and time is an element of this function.
分化现象还负责板块构造;大陆的形成、地震、生活。