Of Earth? It is molten metal, churned and stirred by the independently spinning solid inner core. read more
The Outer Core is the second to last layer of the Earth. It is a magma like liquid layer that surrounds the Inner Core and creates Earth's magnetic field. In this section you will learn about how Earth's magnetic field is created, how hot it is, how thick the Outer Core is and a few interesting facts about the Outer Core. read more