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The interior of the earth

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Minu Prakash

The document discusses the layers of the interior of the Earth. It is divided into four main layers from outermost to innermost: 1. The crust, the topmost solid rocky layer that varies in thickness from 0-40 km. 2. The mantle, the thick solid layer below the crust extending to 2,900 km depth. The upper mantle is solid while the lower mantle is semi-molten. 3. The outer core, between 2,900-5,150 km, which is liquid. 4. The inner core, the innermost solid layer from 5,150-6,731 km depth with extremely high temperatures and pressures.

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The interior of the earth
SREE KANDESHWARAM POOCHAKKAL B.Ed. 2013-2014 KERALA UNIVERSITY
?Submitted to ?Smt. Anupama tr. ?Social science
? Submitted by ?Minu Prakash.R ? Social Science ?Reg. No. 13383007
? ? ON ? THE INTERIOR OF THE EARTH
? Knowledge about the interior of the earth is limited. As one goes deeper into the earth ,the temperature and pressure increases and this prevents us from learning about the earth s interior through direct access ? . Investigation indicate that even the lava that comes to the surface of the earth through volcanoes are from a depth , maximum of just 64 kilometres
The interior of the earth
Layer Approximate depth in kilometres Average Density A Crust 0 to 40 2.9 B Mantle 40 to 2900 4.5 C Outer Core 2900 to 5150 10.7 D Inner Core 5150 to 6731 15
? The outermost layer of the earth is the crust. Rocks containing minerals like silica, and aluminium make up the continents and rocks containing silica and magnesium make up the ocean floors; these together makes up the earth¡¯s crust. These are known as ¡®sial and sima ? Below the earth¡¯s crust is the mantle. the upper portion of the mantle is a solid state. The upper portion of the mantle and the crust together is called the LITOSPHERE The maximum thickness of the Lithosphere is about 100 km. Lithosphere exists like a broken eggshell. ? Just below the upper mantle the rocks are found in a molten stage. This is due to the high temperature inthis region.This part of mantle is called AESTHENOSPHERE
? Lower mantle followed by the core. This part is made up of mainly rocks formed by nickel and iron and hence it is also called NIFE .The core two parts, an OUTER CORE and an INNER CORE.The outer core exist in a molten state. ? In the centre of earth, the temperature is almost 11000c and the pressure is very high.Hence the the inner core is a solid state.
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The interior of the earth

  • 2. SREE KANDESHWARAM POOCHAKKAL B.Ed. 2013-2014 KERALA UNIVERSITY
  • 3. ?Submitted to ?Smt. Anupama tr. ?Social science
  • 4. ? Submitted by ?Minu Prakash.R ? Social Science ?Reg. No. 13383007
  • 5. ? ? ON ? THE INTERIOR OF THE EARTH
  • 6. ? Knowledge about the interior of the earth is limited. As one goes deeper into the earth ,the temperature and pressure increases and this prevents us from learning about the earth s interior through direct access ? . Investigation indicate that even the lava that comes to the surface of the earth through volcanoes are from a depth , maximum of just 64 kilometres
  • 8. Layer Approximate depth in kilometres Average Density A Crust 0 to 40 2.9 B Mantle 40 to 2900 4.5 C Outer Core 2900 to 5150 10.7 D Inner Core 5150 to 6731 15
  • 9. ? The outermost layer of the earth is the crust. Rocks containing minerals like silica, and aluminium make up the continents and rocks containing silica and magnesium make up the ocean floors; these together makes up the earth¡¯s crust. These are known as ¡®sial and sima ? Below the earth¡¯s crust is the mantle. the upper portion of the mantle is a solid state. The upper portion of the mantle and the crust together is called the LITOSPHERE The maximum thickness of the Lithosphere is about 100 km. Lithosphere exists like a broken eggshell. ? Just below the upper mantle the rocks are found in a molten stage. This is due to the high temperature inthis region.This part of mantle is called AESTHENOSPHERE
  • 10. ? Lower mantle followed by the core. This part is made up of mainly rocks formed by nickel and iron and hence it is also called NIFE .The core two parts, an OUTER CORE and an INNER CORE.The outer core exist in a molten state. ? In the centre of earth, the temperature is almost 11000c and the pressure is very high.Hence the the inner core is a solid state.