Earth's core
density of the planet Earth is on average 5,515 kg / cu.m but only if measured average density of the Earth's surface and measured just 3000 kg / m³, which causes that conclusion. There must be other objects The denser than the Earth's core, of course. During the rise of the Earth about 4.5 billion years ago. The melting could cause a material with a density greater than flow into the core of the world as a substance that is less dense than Earth's crust is covered. This causes the Earth's core (core) are composed of up to 80% iron, nickel and molybdenum, as well as a lighter weight than others. But while the matter is more dense. Such as lead and uranium There is little than can be combined with lighter elements have. Substances and those still on earth. Earth's core is divided into two phases.
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