LAYERS OF THE EARTH

• COMPOSITIONAL LAYERS

  Crust - outermost layer

  Mantle - lies in between the crust and the core; generally composed of aluminum and silicates

  Core - mainly composed of iron and nickel
• Mechanical Layers

  Lithosphere - includes crust and top of mantle

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  Asthenosphere - "plastic layer" where mantle flows easily

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  Mesosphere - includes the lower mantle, where the mantle flows slower than the asthenosphere

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  Outer Core - iron and nickel composition; liquid layer; produces the Earth's magnetic field

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  Inner Core - iron and nickel composition; different with outer core since it is solid due to intense pressure
• THICKEST TO THINNEST LAYERS

  Mantle > Outer Core > Inner Core > crust