LAYERS OF THE EARTH Layers Density/Pressure/Temp. Seismic Waves (energy releaseded from EQ’s)
3 Main Layers of Earth Crust • Mantle •Core
Continental CRUST Continental Crust Land, mountains, soil Mostly Granite rock Elements: Silicon Oxygen Aluminum Calcium Sodium
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
Oceanic CRUST Oceanic Crust The Crust beneath the oceans Mostly basalt rock
Oceanic CRUST Oceanic Crust Beneath the oceans Mostly basalt rock Elements: Silicon Iron Oxygen Magnesium
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
MANTLE Elements: Oxygen Iron Silicon magnesium
MANTLE 1800 miles thick Starts @ 32km below the surface & goes to 2900km! 68 % of the Earth’s entire mass 80 % of Earth’s volume
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
Liquid Outer CORE Liquid outer core Elements: Iron & Nickel Hot magnetic liquid Starts @ 2900 km and goes to 5150 km deep Temp ranges from 2200° C to 5000°C
Solid Inner CORE Solid Inner Core Elements Iron & Nickel Solid Magnet Starts @ 5150 km below Earth’s surface and goes to the Earth’s center. Temp ranges from 5000° C to 9000°C
Solid Inner CORE Most dense Greatest pressure Hottest layer