Describe the internal structure of the earth?
Question: Describe the internal structure of the earth?
The Earth's internal structure is characterized by its layered composition, each defined by distinct properties. The outermost layer is the crust, a solid silicate shell that varies in thickness from about 5 km beneath the oceans to up to 70 km beneath the continents. Beneath the crust lies the mantle, which extends to a depth of about 2,900 km. The mantle is divided into the upper and lower mantle, where the upper part includes the asthenosphere, a highly viscous layer upon which the tectonic plates move. The core is split into two parts: the outer core, which is a liquid layer responsible for creating the Earth's magnetic field through its flow, and the inner core, a solid sphere composed primarily of iron and nickel. This structure is inferred from various observations and measurements, including seismic wave analysis, gravitational fields, and direct sampling from volcanic activity.
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