Science - 10

• Geology studies the structure of the earth origin and development.
• Major layer of the earth

  • Crust
  • Mantle
  • Core
• Crust - the thinnest and outermost part/layer of the earth
• It is made of variety of solid rocks like sedimentary, metmorphic and igneous rocks
• Mantle - the layer next beneath the crust
• It is mainly made of silicate & molten rocks
• Core - the middle portion subdivided into two layers
• Inner core - has a radius of 1300 km and made up of solid iron and nicktel
• outer core - 2900 km below earths surface and is 2250km thick
• inner core is made up of molten iron and nicktel