The Earths Structure Mind Map
- Created by: broog
- Created on: 07-04-15 09:21
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- The Earths Structure and Convection Currents
- Lithosphere
- Crust and Upper Mantle
- 80-90 km thick
- Divided into 7 very larger plates
- and a number of smaller ones
- Asthenosphere
- semi molten
- The plates float and move on this
- Mohorovijic Discontinuity
- Separates the Lithosphere from the Asthenosphere
- on average 7 km below the Ocean floor
- Crust
- Elements present
- Silicon
- Oxygen
- Aluminium
- Potassium
- Sodium
- Varies in thickness
- Beneath Ocean only 6-10 km thick
- Beneath continents it is 30-40 km thick
- Below mountains it is up to 70 km thick
- Elements present
- Mantle
- made of semi molten and moltern rock
- contains lighter elements e.g. silicon and Oxygen
- The Core
- made of dense rocks containing
- Iron alloys
- Nickle alloys
- Molten Outer Core
- Solid Inner Core
- made of dense rocks containing
- Lithosphere
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