Mantle: Thickest layer; semi-solid with convection currents driving plate tectonics. Outer Core: Liquid metal layer that generates Earth's magnetic field. Inner Core: Solid metal sphere, extremely hot but kept solid by high pressure. Earth’s internal structure is a dynamic system, with heat ...
convection current On the Web: Academia - Continental Drift and the Theory of Plate Tectonics (PDF)(Jan. 14, 2025) See all related content Watch Earth's continents move, from 650 million years ago to 250 million years in the futureA time-lapse representation of Earth changing through geologic...