Layers of the Earth Crust Mantle Outer Core

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Layers of the Earth Crust Mantle Outer Core Inner Core

Layers of the Earth Crust Mantle Outer Core Inner Core

Crust • Avg. thickness- 35 km • 2 kinds 1. Continental 20 -90 km

Crust • Avg. thickness- 35 km • 2 kinds 1. Continental 20 -90 km thick; known as sial; contains older rock, primarily granite; less dense than oceanic crust 2. Oceanic 5 -10 km thick; known as sima; younger rock, primarily basalt; more dense crust

Crust Cont. • All life exists in the crust of the Earth. • Approximately

Crust Cont. • All life exists in the crust of the Earth. • Approximately 90 different elements are found in the crust, but 5 make up 90% of the crustoxygen, silicon, aluminum, iron, & calcium • Sodium, potassium, & magnesium are the most common elements in the remaining 10%

Mantle Earth’s mantle contains 80% of Earth’s volume & 67% of Earth’s mass. Common

Mantle Earth’s mantle contains 80% of Earth’s volume & 67% of Earth’s mass. Common elements found in the mantle are: silicon, oxygen, aluminum, iron, & magnesium. The mantle consists of solid rock, except for the asthenosphere. Density increases in the mantle as depth increases

Layers of the Mantle The mantle is divided into 3 sections. 1. Lithosphere- consists

Layers of the Mantle The mantle is divided into 3 sections. 1. Lithosphere- consists of the uppermost part of the mantle (rigid rock) & the crust. Average thickness is 100 km. - Moho’s discontinuity- boundary separating crust from mantle; discovered in 1909 using seismic data; found approximately 30 km from Earth’s surface

Layers of the Mantle cont. 2. Asthenosphere- 100 -250 km deep; more fluid layer,

Layers of the Mantle cont. 2. Asthenosphere- 100 -250 km deep; more fluid layer, but not liquid 3. Mesosphere- lowest layer; rigid rock; 660 -2900 km deep -temperature increases with depth, as does density

Core Diameter of the total core is 6960 km = to approximately the diameter

Core Diameter of the total core is 6960 km = to approximately the diameter of Mars The core is 1/6 of Earth’s volume & 1/3 of its total mass

Outer Core • Approximately 2270 km thick • Temperature approximately 40005000º Celsius • Liquid;

Outer Core • Approximately 2270 km thick • Temperature approximately 40005000º Celsius • Liquid; very dense molten iron & nickel • Believed to create Earth’s magnetic field; similar to the magnetic field around a magnet

Inner Core • Temperature is about 5000º Celsius • Believed to be solid; very

Inner Core • Temperature is about 5000º Celsius • Believed to be solid; very dense iron & nickel • Remains solid due to immense pressure (may be 2 million times stronger than normal pressure exerted on Earth’s surface); molecules can not spread out & become liquid

Crust Inner Core Earths Layers Outer Core MantleCrust Inner Core Earths Layers Outer Core Mantle
Layers of the Earth Crust Mantle Outer CoreLayers of the Earth Crust Mantle Outer Core
Layers of the Earth Crust Mantle Outer CoreLayers of the Earth Crust Mantle Outer Core
Layers of Earth Layers of Earth Crust CrustLayers of Earth Layers of Earth Crust Crust
Layers of Earth Layers of Earth Crust CrustLayers of Earth Layers of Earth Crust Crust
The Earths Layers Crust Mantle Outer Core InnerThe Earths Layers Crust Mantle Outer Core Inner
Layers of Earth Layers of Earth Core MantleLayers of Earth Layers of Earth Core Mantle
crust mantle Outer core Inner core The temperaturecrust mantle Outer core Inner core The temperature
EARTHS LAYERS EARTHS LAYERS Earths layers core mantleEARTHS LAYERS EARTHS LAYERS Earths layers core mantle
3 MAIN LAYERS OF EARTH MANTLE OUTER CORE3 MAIN LAYERS OF EARTH MANTLE OUTER CORE
The Earths Interior Crust Lithosphere Mantle Outer CoreThe Earths Interior Crust Lithosphere Mantle Outer Core
The Earths Interior Crust Lithosphere Mantle Outer CoreThe Earths Interior Crust Lithosphere Mantle Outer Core