• Earth's Chemical Composition Layers: The Earth is composed of three main layers based on chemical composition: the crust (continental and oceanic, varying in thickness and density), the mantle (primarily silicate minerals with magnesium and iron), and the core (mostly iron and nickel, divided into liquid outer and solid inner cores with extremely high temperatures). • Earth's Physical Properties Layers: Considering physical properties, the Earth consists of five layers: the lithosphere (rigid outer layer encompassing the crust and upper mantle), the asthenosphere (semi-molten, slowly flowing layer beneath the lithosphere), the mesosphere (strong, lower mantle), and the outer and inner cores (liquid and solid iron-nickel respectively). • Core Characteristics: The Earth's core is the densest layer, comprising approximately one-third of the planet's mass. The outer core, in liquid form, is responsible for the Earth's magnetic field. The inner core, despite extremely high temperatures, remains solid due to immense pressure.
Summary and free worksheet covering the Layers of the Earth
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