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Inside the Earth

Inside the Earth. Chemical Composition (What it is made of). Crust Mantle Core. Outer layer 5-100 km thick 2 types of crust Oceanic very dense, made of basalt, about 3 – 5 miles (8km) thick Continental less dense, made of granite, about 25 miles(32km) thick.

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Inside the Earth

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  1. Inside the Earth

  2. Chemical Composition(What it is made of) • Crust • Mantle • Core

  3. Outer layer 5-100 km thick 2 types of crust Oceanic very dense,made of basalt,about 3 – 5 miles (8km)thick Continental less dense,made of granite,about 25 miles(32km) thick. Made of: aluminum, calcium, iron, magnesium, oxygen, potassium, silicon, sodium The Crust

  4. Oceanic and Continental Crust

  5. Middle layer Very thick layer, extends from 200 km to 3000 km; approx. 2,900 km thick The largest layer A dense, hot layer of semi-solid rock Made of: silicon, iron, oxygen, magnesium 80% of volume, 68% of mass The Mantle

  6. The Core • Made mostly of iron and some nickel • 1/3 of the earth’s mass • Very hot • A ball of very hot, dense metals

  7. The Core Core, which is nearly twice as dense as the mantle because it composition is metallic (iron-nickel alloy) rather than stony. The core is made up of two parts, a thick liquid center and a thick solid inner core. The liquid core spins, creating the Earth’s magnetic field.

  8. Physical Structure of the Earth(5 Layers) • Lithosphere- rigid outer layer (crust) • Asthenosphere- solid rock that flows slowly (like hot asphalt) • Mesosphere- middle layer • Outer Core- liquid layer • Inner Core- solid, very dense

  9. Lithosphere • The crust and upper layer of the mantle • The lithosphere is • rigid and solid, but also brittle • broken into pieces called plates that are moving • wherevolcanoesform

  10. Asthenosphere • The semi-solid, semi-liquid in the mantle • Flows like hot asphalt under a heavy weight (called plasticity) • 700 km deep • Convection currents occur here, that cause the plates of the lithosphere to move

  11. Mesosphere • Most of the mantle • A very thick, semi-liquid layer

  12. Outer Core • Liquid iron & nickel • Extremely hot (3800° C) • 2200 km thick

  13. Inner Core • The hot metals are under so much pressure they are a solid • Solid iron & nickel • 5000° C • Diameter of 2400 km

  14. How are the earth’s layers similar to an egg? Shell=crust Egg white=mantle Yolk=core Earth’s Layers

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