Earth’s Interior Structure. Crust Mantle Outer Core Inner Core Layers of the Earth.
Layers of the Earth. What Are The Earth’s Layers ? Inner Core Outer Core Mantle Crust.
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Transcript of Layers of the Earth. What Are The Earth’s Layers ? Inner Core Outer Core Mantle Crust.
![Page 1: Layers of the Earth. What Are The Earth’s Layers ? Inner Core Outer Core Mantle Crust.](https://reader035.fdocuments.us/reader035/viewer/2022062221/56649db55503460f94aa707f/html5/thumbnails/1.jpg)
Layers of the Earth
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What Are The Earth’s Layers ?
• Inner Core
• Outer Core
• Mantle
• Crust
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Characteristics of The Inner Core•Solid ball due to high pressure (most dense layer)
•1540 miles across
•3700°C = VERY HOT!
•Iron and nickel
•Intense pressure keeps it from liquefying
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Characteristic of The Outer Core
•Dense liquid molten rock
•1400 miles thick
•Mainly iron and nickel
•Some silicon
•Between mantle and inner core
•Gives Earth its magnetic field
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Characteristics of The Mantle
• Parts are semi-molten (silly putty)
• 1800 miles thick• Mantle rock is more
dense than crustal rock
• Flows in sluggish currents
• Between crust and outer core
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The Crust• Earth’s outer rocky surface• 4 miles thick under oceans• Up to 40 miles thick under
mountain ranges• Consists of mostly “light” rocks
(granite – below continents) (basalt – below oceans)
• Oceans cover 71% of the crust (oceanic crust is very dense)
• Continental crust is less dense
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Oceanic and Continental CrustNote: the directions of movement
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Tectonic Plates• Earth’s crust is broken into about 19
pieces
• These plates move on top of the asthenosphere
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Earth’s Layers
• Are Earth’s layers similar to a hard boiled egg?
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How Are Earth’s Layers Similar To a Hard Boiled Egg?
The Yolk
=core , inner & outer core
•Egg white
•=mantle
The Shell
=crust
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Other Physical Structures of the Earth’s Layers
• Lithosphere- includes the crust and the upper most portion of the asthenosphere.
This area glides over the rest of the upper mantle. Zone of earthquakes/volcanoes.
• Asthenosphere- top layer of the upper mantle which consists of highly viscous rock that flows slowly (like hot asphalt)
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