The document describes the four main layers that make up the Earth - the crust, mantle, outer core, and inner core. The crust is the top-most layer where life exists, ranging from 5-25 miles thick. Below is the mantle, a semi-liquid layer 3000 km wide that causes convection currents moving the continents. Deepest are the solid inner core and surrounding liquid outer core, both composed primarily of iron.

1. JOURNEY TO THE
CENTER OF EARTH

2. LAYERS OF THE EARTH
Crust
Mantle
Outer Core
Inner Core

3. THE CRUST
Layer that we live on
(Lithosphere)
5-25 miles thick
Consists of cooled rock
Thinnest layer of the earth
There are 2 kinds of Crust:
Continental (thicker) and
Oceanic (thinner)

4. CRUST
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5. THE MANTLESemi-liquid
(magma)
3000 km wide
softer closer
to the surface
(Asthenosphe
re)
Has convection
currents that
move the
continental
plates

6. THE MANTLE
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7. THE OUTER CORE
Liquid, molten rock
Very high temperatures
Made of Nickel and Iron

8. THE INNER CORE
Solid layer
Solid because of high
pressure
Mostly Iron
6,000 degree Celsius.
2,100 km wide

9. THE CORE
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10. THE CORE
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