What is the physical characteristics is the Earths core?
Earth’s Core: Beneath the mantle (where the magma is) is the Earth’s core. The Earth’s core consists of a fluid outer core and a solid inner core. Because the outer core contains iron, when it flows it generates a magnetic field. This is the source of the Earth’s magnetic field. Outer Core: – extends to a depth of around 3000 miles beneath the surface – made up of super-heated liquid lava (magma) – magma is believed to be mostly iron, and nickel – the entire core measures just over 4,225 across Inner Core: – extends another 900 miles inward towards the center of the Earth – believed to be a solid ball of mostly iron, and nickel http://www.universetoday.com/guide-to-sp… http://www.kidsgeo.
