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Unit 1: Structure of the Earth

. 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 magnesiumRelative Temperature: Vary from air temperature to 870 oCDensity: 2.5 to 3.0 times denser than water. The Mantle. Layer of hot rock between the crust and core.Composition: silicon, oxygen, iron, and magnesiumRelative Temperature: 870oC to 2,200oCDensity: 3.3 to 5.5 times denser than water. .

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Unit 1: Structure of the Earth

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    1. Unit 1: Structure of the Earth

    3. 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

    4. 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.

    5. 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

    6. Crust Mantle

    7. Lithosphere The rigid layer formed from the uppermost part of the mantle and the crust together. Averages 100 km thick

    9. Asthenosphere Upper part of the Mantle. Molten (melted) rock layer. About 175 km thick.

    11. 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.

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

    13. `

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