Earth’s Internal Structure: Layers from Crust to Inner Core #3380211 (License: Personal Use)

This educational diagram presents a cross-section of Earth, highlighting its concentric layers: the thin silicate crust, the ductile upper mantle (including the lithosphere and asthenosphere), the more rigid lower mantle, the liquid iron-nickel outer core, and the solid inner core. The inset shows the relative scale of these layers compared to the planet’s total radius, emphasizing how the crust is remarkably thin relative to deeper layers. Seismic wave behavior informs this model, helping scientists infer density, state, and composition at extreme depths.

Used in geoscience education, planetary science articles, and earth system curriculum pages; targets students, educators, and curious learners seeking foundational knowledge of Earth’s interior structure and geophysical principles.