1. Summary of the Layers of the Earth,

2. Earth Layer
Crust
Mantle
Outer Core
Inner Core

3. Crust Density: Least dense layer overall.
Oceanic Crust (basalt) is more dense than continental crust (granite).

4. Crust
Composition:
Compared to the mantle, it contains more silicon and oxygen and less magnesium and iron.
Continental Crust-
Granite
Oceanic Crust- Basalt

5. Crust Picture: Outermost layer Thinnest: under the ocean
Thickest: under the continents
Crust:
Oceanic + Continental =40 km
Lithosphere:
Crust + Upper Mantle = 100 km

6. Mantle
Density:
Density increases with depth because of the increasing pressure.

7. Mantle Composition: Made mostly of silicon. oxygen, iron, and
magnesium.

8. Mantle Picture: Middle Layer
Thickest layer
Middle portion called the asthenosphere. (~500 km deep)

9. Outer Core
Density:
Between the densities of the mantle and inner core.

10. Outer Core
Composition:
Mostly made of liquid metal.

11. Outer Core
Picture:
5200 km

12. Inner Core
Density:
Solid and most dense layer.

13. Inner Core
Composition:
Mostly made of iron and nickel.

14. Inner Core
Picture:
6400 km

15. The combo of the cores makes our MAGNETIC FIELD!