DO NOW Objective 09/28/12 Identify the layers of the Earth. Take out AGENDA & Weekly Worksheet Week #5 Color in foldable Do you have your Raffle tickets?
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DO NOW
Objective 09/28/12
Identify the layers of the Earth.
•Take out AGENDA & Weekly Worksheet• Week #5
•Color in foldable•Do you have your Raffle tickets?• Put your name on the back of them.
Intro
Objective 09/27/12
Identify the layers of the Earth.
If you tried to dig to the center of the earth, what do you think you would find? Would earth be solid or hollow? Would it be made of the same material throughout?
Earth’s Systems
Atmosphere
Biosphere
Hydropshere
Geosphere
Earth’s gaseous layer of air above the surface
Earth’s life Plants Animals
Earth’s waters Oceans Rivers Lakes
Earth’s solid layers
LAYERS OF THE EARTH
Earth Inside and Out
Compositional property
Physical property
Materials and chemical compounds that make up a layer
Solid, liquid, gas or combination
Layers of the Earth
Compositional Layers
Crust Mantle Core
Layers of the Earth
Crust Composition: rock Thin, outermost
layer Solid 2 Types of Crust
Ocean Crust Continental Crust
Less dense ~5-100km thick
Earth’s Crust
Continental Crust Less dense ~5-100km thick
Ocean Crust Very dense ~5-10km thick
Earth’s Crust
Continental land Continental shelf Slope Floor
Continental Crust Continental Crust Continental Crust Oceanic Crust
Layers of the Earth
Mantle Composition: melted rock (magma) Contains metals
such as aluminum and magnesium
Denser than crust Solid and “plastic-
like”
Layers of the Earth
Layers of the Earth
Core Composition: Iron Very dense Center of Earth
Layers of the Earth
Layers of the Earth
Physical Layers Lithosphere Asthenosphere Mesosphere Outer Core Inner Core
Layers of the Earth
LithosphereAsthenosphere
Mesosphere
Outer Core
Inner Core
Earth’s Layers – Physical Properties
Lithosphere Physical property: solid, rigid
“Litho” means rock
Includes: Crust Upper part of
mantle Broken into
pieces called tectonic plates
Layers of the Earth
Asthenosphere Physical property: liquid & solid (like soft wax)
Flows VERY slowly Includes: upper
mantle
Layers of the Earth
Mesosphere Physical property: liquid & solid (like a very thick syrup)
Includes: lower mantle
“Meso” means middle
Layers of the Earth
Outer Core Physical Property: liquid
Molten iron
Layers of the Earth
Inner Core Physical property: solid
Iron From center of
Earth to surface = 6,380km (3,833miles)
Temperature = 5,430°C (9,800°F).[
The Layers of the Earth
Summary: The inside of the earth is divided into three layers based on their composition: the crust, the mantle, and the core. Based on physical properties it’s split into five layers: lithosphere, asthenosphere, mesosphere, inner core and outer core.
Objective 09/24/12
Outro
Identify the layers of the Earth.
Write down:•3 things you learned today•2 reasons why it is important•1 question you still have
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