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The Earth’s Layers

Students will … illustrate the structural layers of Earth, including the inner core, outer core, mantle, crust, asthenosphere, and lithosphere. [6.10A]

   Each layer of the Earth has its own unique properties.

There are three distinct layers – mantle, and core subdivided into more layers.

the crust, – which can then be Each layer is made up of specific elements .

   Crust Mantle Core

  

Outermost

layer Thinnest layer and much

cooler

than others 2 types of crust 1.

Oceanic

basalt) (very dense, made of 2.

Continental

(less dense, made of granite)

Thinnest mountain beneath ocean and thickest beneath ranges

     Layer

beneath Middle

Very layer

thick

crust layer Made up of more iron and magnesium so is very

dense Convection

occur in the mantle currents

     Consists of the crust and the upper part of the mantle Solid and rocky Broken into large pieces called tectonic plates Earthquakes can occur in the lithosphere Made up of elements Oxygen and Silicon

Lithosphere

     Beneath the lithosphere Partially molten The rock is pliable or plastic-like Rock here bends, stretches, and flows The tectonic plates float on this layer

Asthenosphere

  Earth’s crust is broken into about a dozen major plates and several minor plates These plates constantly move on top of the Asthenosphere

    Made up of the elements iron 1/3 of the Earth’s mass The core is larger than Mars !

The core is very hot and dense and nickel

    The outer core is a liquid The material of the outer core is considered molten as it is extremely hot Less dense than the inner core Made up of Iron Nickel and

Outer Core

   The inner core is the most dense It is solid extreme even though the temperature is very hot due to the pressure The inner core is composed mostly of Iron

Inner Core

 How are the Earth’s layers similar to an egg?

   Shell=

crust

Egg white=

mantle

Yolk=

core

    Crust and Lithosphere - rigid outer layer Mantle and Asthenosphere - solid rock that flows slowly (like hot asphalt) Outer Core liquid layer Inner Core solid, very dense

  http://geomaps.wr.usgs.gov/parks/pltec/#cr ust http://pubs.usgs.gov/gip/dynamic/dynamic.

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