Transcript layers of the Earth

Objective 09/28/12
Identify the layers of the Earth.
DO NOW
•Take out AGENDA & Weekly Worksheet
•Week #5
•Color in foldable
•Do you have your Raffle tickets?
•Put your name on the back of them.
Objective 09/27/12
Identify the layers of the Earth.
Intro
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
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Atmosphere
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Biosphere
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Earth’s gaseous layer of air
above the surface
Earth’s life
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Hydropshere
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Earth’s waters
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Geosphere
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Plants
Animals
Oceans
Rivers
Lakes
Earth’s solid layers
Earth Inside and Out
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Compositional
property
Physical property
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Materials and
chemical compounds
that make up a layer
Solid, liquid, gas or
combination
Layers of the Earth
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Compositional Layers
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Crust
Mantle
Core
Layers of the Earth
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Crust
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Composition: rock
Thin, outermost layer
Solid
2 Types of Crust
 Ocean
Crust
 Continental Crust
 Less
dense
 ~5-100km thick
Earth’s Crust
 Continental
 Less
Crust
dense
 ~5-100km thick
 Ocean
 Very
Crust
dense
 ~5-10km thick
Earth’s Crust
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Continental land
Continental shelf
Slope
Floor
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Continental Crust
Continental Crust
Continental Crust
Oceanic Crust
Layers of the Earth
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Mantle
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Composition: melted
rock (magma)
 Contains
metals such as
aluminum and
magnesium
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Denser than crust
Solid and “plastic-like”
Layers of the Earth
Layers of the Earth
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Core
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Composition: Iron
Very dense
Center of Earth
Layers of the Earth
Layers of the Earth
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Physical Layers
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Lithosphere
Asthenosphere
Mesosphere
Outer Core
Inner Core
Layers of the Earth
Lithosphere
Asthenosphere
Mesosphere
Outer Core
Inner Core
Earth’s Layers – Physical Properties
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Lithosphere
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Physical property:
solid, rigid
“Litho” means rock
Includes:
 Crust
 Upper
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part of mantle
Broken into pieces
called tectonic plates
Layers of the Earth
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Asthenosphere
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Physical property:
liquid & solid (like soft
wax)
Flows VERY slowly
Includes: upper mantle
Layers of the Earth
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Mesosphere
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Physical property:
liquid & solid (like a
very thick syrup)
Includes: lower mantle
“Meso” means middle
Layers of the Earth
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Outer Core
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Physical Property:
liquid
Molten iron
Layers of the Earth
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Inner Core
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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
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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
Identify the layers of the Earth.
Outro
Write down:
•3 things you learned today
•2 reasons why it is important
•1 question you still have