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.

The primary structure is a series of layers: an outer silicate crust, a mechanically weak asthenosphere, a solid mantle, a liquid outer core whose flow generates the Earth's magnetic field, and a solid inner core.

Aug 1, 2023 · Learn about the layers of the Earth and get facts about their structure, density, thickness, and temperature.

Learn all about the structure of the Earth here at National Geographic Kids! Join us as we explore the different layers - the crust, upper mantle, lower mantle, outer core and inner core...

Apr 17, 2026 · The basic structure of Earth—crust, mantle, and core—appears to be replicated on the other terrestrial planets, though with substantial variations in the relative size of each region.

Structure of the Earth - Find out how the Earth is structured, the features of each section and the characteristics of the crust (lithosphere).

The size of the Earth -- about 12,750 kilometers (km) in diameter-was known by the ancient Greeks, but it was not until the turn of the 20th century that scientists determined that our planet is made up of …