1. LAYERS OF THE EARTH Layers Density/Pressure/Temp.
Seismic Waves (energy releaseded from EQ’s)

2. 3 Main Layers of Earth
Crust • Mantle •Core

3. Continental CRUST Continental Crust Land, mountains, soil
Mostly Granite rock
Elements:
Silicon
Oxygen
Aluminum
Calcium
Sodium

4. Continental CRUST Continental Crust - 32 km or 20 miles thick
Coolest Temp. of all layers
Least dense of all layers
Density 2.7 g/cm3

5. Oceanic CRUST Oceanic Crust The Crust beneath the oceans
Mostly basalt rock

6. Oceanic CRUST Oceanic Crust Beneath the oceans Mostly basalt rock
Elements:
Silicon
Iron
Oxygen
Magnesium

7. Oceanic CRUST Surface to 8 km or 5 miles thick
Temp ranges from 870 degrees Celsius to higher
Density 3g/cm3
Greater pressure than Continental Crust

8. MANTLE
Elements:
Oxygen
Iron
Silicon
magnesium

9. MANTLE
1800 miles thick
32km below the surface & goes to 2900km!
68 % of the Earth’s entire mass
80 % of Earth’s volume

10. MANTLE Temp from 870 degrees Celsius to 2200 degrees Celsius
Pressure and Density is greater than the crust
Plasticity:
A solid that flows like a liquid
Brittle upper mantle

11. Liquid Outer CORE Liquid outer core Elements: Iron & Nickel
Hot magnetic liquid
km and goes to 5150 km deep
Temp ranges from 2200° C to 5000°C

12. Solid Inner CORE Solid Inner Core Elements Iron & Nickel Solid Magnet
km below Earth’s surface and goes to the Earth’s center.
Temp ranges from 5000° C to 9000°C

13. Solid Inner CORE
Most dense
Greatest pressure
Hottest layer