Geological cross section of Earth, showing the different layers of the interior. The internal structure of Earth is the spatial variation of chemical and physical properties in the solid earth.

Nov 10, 2025 · Learn about the structure of the Earth, its crust, mantle, and core. Discover how heat, pressure, and convection shape our dynamic planet from within.

Mar 6, 2026 · The inner core is a solid ball of metal at the very center of the Earth, roughly 1,220 kilometers (about 760 miles) in radius. It sits beneath every other layer of the planet, surrounded by …

Unlike the yolk of an egg, however, the Earth's core is actually made up of two distinct parts: a 2,200 km-thick liquid outer core and a 1,250 km-thick solid inner core.

Mar 6, 2026 · Earth - Core, Mantle, Crust: More than 90 percent of Earth’s mass is composed of iron, oxygen, silicon, and magnesium, elements that can form the crystalline minerals known as silicates.

Aug 1, 2023 · The four main layers of the Earth are the crust, mantle, outer core, and inner core. The Earth, like an onion, consists of several concentric layers, each with its own unique set of properties …

May 31, 2025 · The Earth beneath us may seem solid and immovable, but geologists know it hides a complex and dynamic interior. From fiery molten layers to solid metal cores, the Earth’s internal …

Sep 20, 2024 · At the very center of the Earth is the inner core, which is solid iron and about 1221 kilometers wide. It is extremely hot, with temperatures as high as the surface of the sun (around …

Earth is the planet we live on, the third of eight planets in our solar system and the only known place in the universe to support life. The mantle is the mostly solid bulk of Earth's interior. The mantle lies …

This page covers Earth's internal structure, including the core, mantle, and crust, and explains their compositions and mechanical properties. It describes how seismic waves from earthquakes inform …