1. Earth Walk: Structure of Earth
Name:_______________________
Location
Description
Scaled Distance from center of core (steps)
Actual Distance from center of core (kilometers)
Inner Core
Metal (iron and nickel), solid, 3 – 5 million atmospheres of pressure, 8 – Celsius
Density : 12 – 13 grams/cm3
60 steps
0 – 1200 km
Outer Core
Metal (iron and nickel), liquid, generates the magnetic field, 2 – 1000 Celsius
Density : 9.9 – 12 grams/cm3
175 total steps
1200 – 3500 km
Mantle
Olivine rich rock,
1, 000 Celsius, 1 million atmospheres, near solid to liquid (like silly putty)
Density: 3.3 – 6 grams/cm3
315 total steps km

2. Asthenosphere (upper mantle)
Layer of upper mantle on which the plates move
6200 – km
Lithosphere and Crust
Oceanic crust: basalt, 0 – 20 km thick, density: grams/cm3
Continental crust: granite,
Density: 2. 7 – 3 grams/cm3
Lithosphere makes up plates
20 – 70 km thick
320 total steps km
Deepest Drill Hole
Kola Russia
12 km
(7 miles)
Deepest mine
TauTona Mine, South Africa
3.8 kilometers