1. The Layers of Earth

2. The Layers of the Earth
Inner Core
Outer Core
Mantle
Crust

3. Layers of the Earth

4. Inner Core Solid, innermost layer of Earth
Hottest part of the Earth ( oC ,000oF)
The inner core experiences the greatest amount of pressure, so it’s solid.
Dense and comprised mostly of iron and some nickel
1250 km thick
Density g/cm3

5. Outer Core Beneath the mantle
Inner and Outer Core are 1/3 of the earth’s mass
fluid outer core made of nickel and iron
outer boundary lies approximately 2,890 km beneath Earth’s surface
the iron in the outer core generates Earth’s magnetic field
km thick
o C
Density g/cm3

6. Mantle is very hot part melted and part solid iron and magnesium
The region just below the crust and extending all the way down to the Earth's core
is very hot
part melted and part solid iron and magnesium
It is relatively flexible so it flows instead of fracturing
2800 km thick- thickest layer
1400oC – 3000oC- cooler at the top of the layer and gets hotter as it goes deeper
Density- 4.5 g/cm3

7. is the outer layer of the mantle
Asthenosphere
is the outer layer of the mantle
solid rock that flows slowly (like hot asphalt)
Lies between 100 and 200km below Earth’s surface
Involved in plate movement- lithospheric plates “float” on it
Convection currents circulate heat from the core- heated “liquid” rises and cooler “liquid” falls

8. Crust Thinnest layer; density 3 g/cm3
The Earth's outermost layer of the 4 main layers
The crust is typically about km thick beneath continents, and about 10 km thick beneath oceans.
made of soil, water and rock
The crust is relatively light and brittle.
Most earthquakes occur within the crust.
Temperature 0oC – 400oC
Where volcanic magma erupts
The crust in this image is much smaller in the real earth!
Lithosphere
Continental crust- land
Oceanic crust- under water

9. Lithosphere
Is made up of the Crust and the uppermost part of the mantle
rigid outer layer
Broken into 30 sections or plates
Two types:
Oceanic lithosphere, which is associated with Oceanic Crust and exists in the ocean basins
Continental lithosphere, which is associated with Continental Crust

10. Color and Label the layers of the Earth.

11. Answers
Inner Core
Mantle
Athenoshpere
Crust
Outer Core
Lithosphere

12. Questions On a piece of paper answer the following questions.
The planet we call Earth has how many main layers?
What layer is farthest from where we stand?
Which layer has the highest temperature?
Which layer has convection currents?
Which layer is broken into plates?