explain 4 layers of the earth (detialy)
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1. Crust
Earth’s crust is what we walk on every day. It is the thin (relatively) outermost layer that wraps around the Earth and ranges in temperature from 500 to 1,000°C. The crust is split into two types, continental and oceanic. Earth’s crust is 5 to 70 km thick.
2. Mantle
Just below the crust lies the mantle. The mantle is semi-liquid, sort of like a malleable plastic and makes up 84% of Earth’s volume. Earth’s mantle is 2,900 km thick and is broken down into 3 main zones, the lithosphere, asthenosphere, and mesosphere.
3. Outer Core
The outer core lies beneath the mantle. This liquid iron and nickel layer spins as the planet rotates and creates Earth’s magnetic field. This magnetic field helps to protect us from the Sun’s solar radiation. The outer core is 2,200 km thick and very hot at up to 6,100°C!
4. Inner Core
The inner core is the deepest layer on Earth. It is also made up of iron and nickel but the pressure is so high that it is no longer liquid. The temperatures in the inner core are as hot as the surface of the sun, about 5505 °C. Earth’s inner core is 1,230 to 1,530 km thick.
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The structure of the earth is divided into four major components: the crust, the mantle, the outer core, and the inner core. Each layer has a unique chemical composition, physical state, and can impact life on Earth's surface. Movement in the mantle caused by variations in heat from the core, cause the plates to shift, which can cause earthquakes and volcanic eruptions. These natural hazards then change our landscape, and in some cases, threaten lives and property.
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