Joe Billy Bob 10/9/2012 Earth Structure Pre-Questions: 1) What is the Big Bang Theory?
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Joe Billy Bob10/9/2012
Earth Structure
Pre-Questions:
1) What is the Big Bang Theory?2) What is a theory?3) What is the Earth made of?
Notes:
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Diagram Rules
• Draw diagrams in pencil• Draw label lines in pen• All labels should be
aligned• No arrows or crossing
lines• Do not circle parts• Do not draw on line
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Earth Structure
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Big Bang Theory
Tells us how the universe began based on two ideas:
1. All matter condensed to a single point and then exploded (bang)
2. The explosion created the universe (planets, galaxies, etc.) we know today
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Earth Structure
The Earth is divided into three main layers
Each layer is made of different temperature of rock.
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Earth Layers
crust
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Crust
• Outermost layer that we live on
• Thinnest layer (0 – 30 km)• Solid and made of
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Earth Layers
crustupper mantlelower mantle
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Mantle
• Semisolid layer below crust• Split into two layers
o Upper mantle 700 – 1300˚C 30 - 2900 km
o Lower mantle 1800 – 2800˚C 2900 – 5200 km
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Earth Layers
crustupper mantlelower mantleouter core
inner core
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Core
• Makes up 1/3 of the Earth’s mass
• Split into two layerso Outer Core
3200˚C Liquid iron/nickel
o Inner Core 4500˚C Solid iron ball
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Earth Layers
atmospherecrustupper mantlelower mantleouter coreinner core
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AtmosphereLayers of gas that surround
the crust
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Follow the link below to review the different Earth layers and their properties
http://www.learner.org/interactives/dynamicearth/swfs/earth.swf
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