(i) Lithosphere/crust
- It is made up of two layers /sial and sima
- Sial is the upper layer and consist of silicon and Aluminium
- It extends between 6-80km
- Sima consists of silicon and Magnesium
- Sial mainly consist of granific rocks
- Sial has a density of between 2.65 to 2.70gm/cc
- Sial mainly consist of basaltic rocks
- Sima has density of between 2.7 to 3.0 gm/cc
- Sima is some how flexible
(b) Core
- It is divided into inner and outer core
- Outer core is mainly made of iron and nickel
- Inner core is mad up of iron
- Density of the core ranges from 12gm/cc to 17g/cc
- It has a radius of about 3450km
- The inner core is in solid state
Kavungya answered the question on May 29, 2019 at 06:54
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