The Earths Layers Students will illustrate the structural

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The Earth’s Layers

The Earth’s Layers

Students will … illustrate the structural layers of Earth, including the inner core, outer

Students will … illustrate the structural layers of Earth, including the inner core, outer core, mantle, crust, asthenosphere, and lithosphere. [6. 10 A]

Earth’s Layers � Each layer of the Earth has its own unique properties. �

Earth’s Layers � Each layer of the Earth has its own unique properties. � There are three distinct layers – the crust, mantle, and core – which can then be subdivided into more layers. � Each layer is made up of specific elements.

Simple Layers � Crust � Mantle � Core

Simple Layers � Crust � Mantle � Core

Into the Earth…

Into the Earth…

The Crust Outermost layer Thinnest layer and much cooler than others 2 types of

The Crust Outermost layer Thinnest layer and much cooler than others 2 types of crust 1. Oceanic (very dense, made of basalt) 2. Continental (less dense, made of granite)

Oceanic and Continental Crust Thinnest beneath ocean and thickest beneath mountain ranges

Oceanic and Continental Crust Thinnest beneath ocean and thickest beneath mountain ranges

The Mantle Layer beneath crust Middle layer Very thick layer Made up of more

The Mantle Layer beneath crust Middle layer Very thick layer Made up of more iron and magnesium so is very dense Convection currents occur in the mantle

Mantle Is Divided into … Consists of the crust and the upper part of

Mantle Is Divided into … 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

Tectonic Plates Earth’s crust is broken into about a dozen major plates and several

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

The Core � Made up of the elements iron and nickel � 1/3 of

The Core � Made up of the elements iron and nickel � 1/3 of the Earth’s mass � The core is larger than Mars! � The core is very hot and dense

The Core is Divided Into… The outer core is a liquid The material of

The Core is Divided Into… 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 and Nickel Outer Core The inner core is the most dense It is solid even though the temperature is very hot due to the extreme pressure The inner core is composed mostly of Iron Inner Core

Earth’s Layers How are the Earth’s layers similar to an egg? Shell=crust Egg white=mantle

Earth’s Layers How are the Earth’s layers similar to an egg? Shell=crust Egg white=mantle Yolk=core

Physical Structure of the Earth Layers Reviewed � Crust and Lithosphere- rigid outer layer

Physical Structure of the Earth Layers Reviewed � 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

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

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

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