The earth is divided into four main layers: the inner core, outer core, mantle, and crust. The core is composed mostly of iron (Fe) and is so hot that the outer core is molten, with about 10% sulphur (S). The inner core is under such extreme pressure that it remains solid.
www.seismo.unr.edu/ftp/pub/louie/class/100/interior.htm... www.seismo.unr.edu/ftp/pub/louie/class/100/interior.html
Inner core - Wikipedia, the free encyclopedia
The inner core of the Earth, its innermost hottest part as detected by seismological studies, is a primarily solid sphere about 1220 kilometer in radius, only about 70% that of the Moon. It is belie...
en.wikipedia.org/wiki/Inner_core
Finally, we would reach the Earth’s inner core. The inner core extends another 900 miles inward towards the center of the Earth. It is believed that this inner core is a solid ball of mostly iron, and nickel.
www.kidsgeo.com/geology-for-kids/0024-earths-inner-core... www.kidsgeo.com/geology-for-kids/0024-earths-inner-core.php
Inner city - Wikipedia, the free encyclopedia
The inner city is the central area of a major city or metropolis. In the United States, Canada, United Kingdom and Ireland, the term is often applied to the poorer parts of the city centre and is so...
en.wikipedia.org/wiki/Inner_city
; Beneath the mantle 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.
www.thetech.org/exhibits_events/online/quakes/inside/co... www.thetech.org/exhibits_events/online/quakes/inside/core.html
inner core ( ¦inər ′kör ) ( geology ) The central part of the earth's core, extending from a depth of 3160 miles (5100 kilometers) to the ... Little is known about the process of growth of Earth's inner core. Because it is slowly cooling, many expected that the inner core would be very homogeneous and clean.
www.answers.com/topic/inner-core www.answers.com/topic/inner-core
Inner Core, innermost part of the Earth. It is estimated at being about 2,225 km 1,380 mi thick and is made up of iron and nickel. Temperatures of... ... Inner Core, innermost part of the Earth. It is estimated at being about 2,225 km (1,380 mi) thick and is made up of iron and nickel. Temperatures of the inner core may reach...
uk.encarta.msn.com/encyclopedia_1461501487/Inner_Core.h... uk.encarta.msn.com/encyclopedia_1461501487/Inner_Core.html
This finding, confirmed only within the past two years, quickly led to the conclusion that Earth's solid-iron inner core is "anisotropic" -- it has a directional quality, a texture similar to the grain in wood, that allows sound waves to go faster when they travel in a certain direction.
www.psc.edu/science/Cohen_Stix/cohen_stix.html
The traditional view of the Earth's interior has the crust (where we live), the upper and inner mantle, the outer core, and the inner core; wrapped around ... The traditional view of the Earth's interior has the crust (where we live), the upper and inner mantle, the outer core, and the inner core; wrapped around each other...
www.universetoday.com/2008/03/10/discovery-of-the-earth... www.universetoday.com/2008/03/10/discovery-of-the-earths-inner-inner-core/