Layers of the Earth. Add 2 boxes GLUE ON PAGE 117.

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Presentation transcript:

Layers of the Earth

Add 2 boxes

GLUE ON PAGE 117

Crust- rigid, rocky outer surface of the Earth, composed mostly of basalt and granite. Thinner under oceans Continental Crust- thick parts of the Earths crust not located under ocean. Lithosphere- crust, plus rigid, upper mantle Oceanic crust- thin parts of Earth’s crust under oceans. Ocean- Large bodies of water, sitting atop oceanic crust. Mohorovicic Discontinuity- separates crust and upper mantle

Mantle- rocky layer located under crust- composed of silicon, oxygen, magnesium, iron, aluminum, and calcium. Convection (heat) currents carry heat from the inner mantle to the cooler outer mantle. Upper mantle- (rigid) uppermost part of the mantle, part of lithosphere. Upper mantle (flowing) Athenosphere- lower part of the upper mantle that exhibits plastic (flowing) characteristics. Asthenosphere- Layer in upper mantle that is made of material that can be reshaped and deformed and on which the continental plates move.

Lower mantle- (semi-rigid) deepest part of the mantle, just above core. Outer core- Molten iron-nickel layer that surrounds the inner core. Inner core- solid iron-nickel center of the Earth, very hot and under great pressure.