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Layers of Earth. Crust Outermost layer Thinnest under ocean Thickest under continent Crust + top of mantle = Lithosphere.

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Presentation on theme: "Layers of Earth. Crust Outermost layer Thinnest under ocean Thickest under continent Crust + top of mantle = Lithosphere."— Presentation transcript:

1 Layers of Earth

2 Crust Outermost layer Thinnest under ocean Thickest under continent Crust + top of mantle = Lithosphere

3 Crust density Least dense overall layer Oceanic crust (basalt) is more dense than Continental Crust (granite)

4 Crust composition Solid rock—mostly silicon and oxygen Oceanic crust—basalt Continental crust--granite

5 Mantle Position Middle layer, thickest layer Top portion called the asthenosphere

6 Mantle Density Density increases with depth of increasing pressure

7 Mantle Composition Hot softened rock Contains iron (Fe) and magnesium (Mg)

8 Core position Inner layer Consists of the outer and inner core

9 Core density Heaviest material; most dense layer

10 Core composition Mostly iron and nickel Outer core—slow flowing liquid Inner core--solid

11 Thickness of Layers Crust: (continental) miles thick (1 % of Earth’s volume) Mantle: 1,800 miles thick (84% of Earth’s volume) Outer core: 1,400 miles thick Inner core: 790 miles thick

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