Unit 1 structure of the earth
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Unit 1: Structure of the Earth. Standard: Compare and Contrast the layers of the earth including composition, relative temperature, and density. . The Crust. Layer of rock that forms Earth’s outer skin including the solid earth and oceans.

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Unit 1 structure of the earth

Unit 1: Structure of the Earth

Standard:

Compare and Contrast the layers of the earth including composition, relative temperature, and density.


The crust
The Crust

  • Layer of rock that forms Earth’s outer skin including the solid earth and oceans.

  • Composition: oxygen, silicon, aluminum, calcium, iron, sodium, potassium, and magnesium

  • Relative Temperature: Vary from air temperature to 870 oC

  • Density: 2.5 to 3.0 times denser than water


The mantle
The Mantle

  • Layer of hot rock between the crust and core.

  • Composition: silicon, oxygen, iron, and magnesium

  • Relative Temperature: 870oC to 2,200oC

  • Density: 3.3 to 5.5 times denser than water.


The core
The Core

  • Center of the Earth; under extreme pressure

  • Composition: iron and nickel

  • Relative Temperature: 2,000oC to 5,000oC

  • Density: 10 to 13 times denser than water


Crust
Crust

Lithosphere

Mantle

Asthenosphere


Lithosphere
Lithosphere

  • The rigid layer formed from the uppermost part of the mantle and the crust together.

  • Averages 100 km thick


Asthenosphere
Asthenosphere

  • Upper part of the Mantle.

  • Molten (melted) rock layer. About 175 km thick.


Outer core
Outer Core

  • Area of molten metal that surrounds the inner core. Because the earth rotates, the outer core spins around the inner core and that causes the earth's magnetism.


Inner core
Inner Core

  • A dense ball of iron and nickel, because of the intense pressure this part is solid.


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