i)Crust
- it is made up of solid rocks
- composed of two layers /sial and sima/continental crust and oceanic crust
- sial is rich in silica and a aluminum
- sima is rich in silica and magnesium
- sima rocks are like plastic/more flexible
- the top layer of the sima is made of sediments and volcanic lava
- the bottom layer of sima is made up of basalt/igneous rocks
- the sima is made up of the basaltic/igneous rocks
- sima is made up of dense rocks /2.8-3.0 gm/cc
- the sial is made up of granites/sedimentary/metamorphic rocks
ii)Core
- the core is composed of two parts i.e. inner core and outer core
- the main mineral of the outer core are iron and nickel
- the main mineral of the inner core is iron
- the inner core has a high density i.e. 16-17gm/cc than the outer core i.e. 10.5gm/cc
- the inner core is made up of a solid rock mass
- the outer core is molten
sharon kalunda answered the question on April 17, 2019 at 07:09
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