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