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:
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
Earth Structure
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
Earth Structure
The Earth is divided into three main layers
Each layer is made of different temperature of rock.
Earth Layers
crust
Crust
• Outermost layer that we live on
• Thinnest layer (0 – 30 km)• Solid and made of
Earth Layers
crustupper mantlelower mantle
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
Earth Layers
crustupper mantlelower mantleouter core
inner core
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
Earth Layers
atmospherecrustupper mantlelower mantleouter coreinner core
AtmosphereLayers of gas that surround
the crust
Follow the link below to review the different Earth layers and their properties
http://www.learner.org/interactives/dynamicearth/swfs/earth.swf