RSS 2.0
 
«     2019    »
 1
2345678
9101112131415
16171819202122
23242526272829
30 
 
|

  
   
2016 (216)
2016 (456)
2016 (321)
2016 (398)
2016 (433)
2016 (554)

 

  Encyclopedia of earthquakes and volcanoes, 3rd edition
    : » »
 
Encyclopedia of earthquakes and volcanoes, 3rd edition title=
: Alexander E.Gates, David Ritchie
: Facts on File
: 2007
isbn: 0816063028
: 365
: english
: PDF
: 18
: 52640
The Earth is a sphere that is flattened at the poles and bulging at the equator. Internally, it is like a hard-boiled egg. In the center, instead of a yolk, it has a core. The core is composed of iron-nickel and contains an inner core that is solid and an outer core that is liquid. The spinning of the Earth causes the two to interact as a self-exciting dynamo that gives Earth its strong magnetic field. The egg white is equivalent to the Earths mantle, which encases the core. The mantle is composed of dense minerals that are rich in iron and magnesium. It has several layers reflecting different minerals and mechanical properties. The shell of the egg is equivalent to the Earths crust, a thin layer of light rock upon which humans live. Unlike the shell, which is uniform, there are two types of crust. Thin, dense, young crust is pulled toward the center of the Earth by gravity and sinks down, whereas thick, light, old crust floats higher. The deeper crust is covered by oceans and called oceanic crust, whereas the lighter crust forms the continents and is called continental crust. The concept of isostasy is the balance between them.
 

:

  • Complete Atlas of the Earth (2nd Edition)
  • Hard Core No.34
  • Soil Engineering. Testing Design And Remediation
  • Earth as an Evolving Planetary System, 2nd Edition
  • Eyewitness Workbooks Earth
  • Continental rifts: Evolution, structure, tectonics
  • The Rough Guide to the Earth 1
  • Earths Core and Lower Mantle
  • Mantle Convection in the Earth and Planets
  • Asteroids and Meteorites: Catastrophic Collisions With Earth


  •  

     
    Mb
    http://depositfiles.com/files/8uc1fthyf17.5
    http://oron.com/2bcv46bnhqz3/bnamenvo8.rar.html17.5

     
    !
     
    • 0
    : toksoft | 24-03-2011, 06:27 | : 492   (0)  

     
       
     
    , , .

     
     

      | | | |
     
    Librus - Mountain of Knowledge
    - 2004-2015
    Design by Flashsoft © 2005-2015