Crust
Earth’s solid, rocky, outer layer
It’s divided into two parts:
Oceanic Crust
Average thickness: 5 – 10 km.
Dense rocks
Basalt – mostly
Lava rocks
Continental Crust
40 – 50 km.
Less dense rocks
Sandstone – mixture of other rocks
Layer that we live one temperature: varies – most extreme 50o C = 100o F.
-45o C = - 80o F
Thinnest of the 4 layers.
Fo = 9/5 (Co) + 32
Mantle
Asthenosphere is just under the crust and it’s both like a liquid and a solid (can
flow). Just like the Oobleck.
Thickness – 2900 km (thickest layer).
Composition – mostly iron, magnesium, and silicon.
Temperature – 870o C = 1500o F
Convection currents occur in this layer.
Outer Core
Thickness – 2200 km.
Composition – iron, nickel (liquid)
Temperature = 2200o C
Inner Core
Thickness – 1300 km.
Composition – iron, nickel (solid)
Temperature = 5000o C