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THE EARTH IS A SYSTEM
Earth’s Principal Systems
   Atmosphere
   Hydrosphere
   Biosphere
   Lithosphere
   Magnetosphere
   Cryosphere
Fig. 1-1, p. 5
Interaction Among Earth’s Systems




                                Table 1-1, p. 4
HOW DOES GEOLOGY
AFFECT OUR LIVES?
Resources Used by Each Person




                                Fig. 1-3, p. 8
Geology and Monuments
   Statue of Liberty
   Mount Rushmore
   Cave of Lascaux
   Treasury at Petra
   Statue of Dav...
WHEN WAS THE EARTH
FORMED?
Formation of Solar System



                       Accretion Disk
Earth’s Formation

   The Earth was formed
    about 4.5 billion years
    ago, from the solar
    accretion disk.
Formation of Earth’s Layers
   Meteorite Impacts
   Gravitation Compression
   Heat from Radioactive Decay
   Formatio...
WHERE IN THE UNIVERSE
IS EARTH?
3rd Planet From the Sun
– 93,000,000 miles
Milky Way Galaxy

   It is part of a fairly
    large spiral galaxy
    consisting of about 200
    billion stars.
   Ye...
WHAT IS THE SHAPE OF
THE EARTH?
Geoid –
Not Quite Round, Not Quite Elliptical
WHAT IS THE EARTH’S
STRUCTURE?
35 km (21 mi.) avg., 1,200˚C

                                                          Layered
Crust




                ...
Earth’s Interior Divisions
                   Earth's Interior Divisions


           Layer      Outer      Approx.     Co...
WHAT GEOLOGIC PROCESSES
OCCUR WITHIN THE EARTH’S
INTERIOR?
Geological Processes
   Plate Tectonics
   Heat Transfer
   Soil Erosion
   Mineral Deposition
Fig. 1-10, p. 16
Fig. 1-11, p. 17
Fig. 1-12, p. 18
Connections between the Plates and
Earth Systems




                              Table 1-3, p. 18
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The Earth is a System

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Transcript of "The Earth is a System"

  1. 1. THE EARTH IS A SYSTEM
  2. 2. Earth’s Principal Systems  Atmosphere  Hydrosphere  Biosphere  Lithosphere  Magnetosphere  Cryosphere
  3. 3. Fig. 1-1, p. 5
  4. 4. Interaction Among Earth’s Systems Table 1-1, p. 4
  5. 5. HOW DOES GEOLOGY AFFECT OUR LIVES?
  6. 6. Resources Used by Each Person Fig. 1-3, p. 8
  7. 7. Geology and Monuments  Statue of Liberty  Mount Rushmore  Cave of Lascaux  Treasury at Petra  Statue of David  Eifel Tower  Egyptian Pyramids
  8. 8. WHEN WAS THE EARTH FORMED?
  9. 9. Formation of Solar System Accretion Disk
  10. 10. Earth’s Formation  The Earth was formed about 4.5 billion years ago, from the solar accretion disk.
  11. 11. Formation of Earth’s Layers  Meteorite Impacts  Gravitation Compression  Heat from Radioactive Decay  Formation of Nickel / Iron Core  Surface Cooling and Formation of Plates  Comet Impacts bring Water
  12. 12. WHERE IN THE UNIVERSE IS EARTH?
  13. 13. 3rd Planet From the Sun – 93,000,000 miles
  14. 14. Milky Way Galaxy  It is part of a fairly large spiral galaxy consisting of about 200 billion stars.  Yellow line indicates path of Earth as the galaxy rotates.
  15. 15. WHAT IS THE SHAPE OF THE EARTH?
  16. 16. Geoid – Not Quite Round, Not Quite Elliptical
  17. 17. WHAT IS THE EARTH’S STRUCTURE?
  18. 18. 35 km (21 mi.) avg., 1,200˚C Layered Crust Sphere 100 km (60 mi.) Low-velocity zone 200 km (120 mi.) Crust Mantle Solid Lithosphere 10 to 65km 2,900km 100 km Asthenosphere (1,800 mi.) (depth unknown) 3,700˚C Outer core (liquid) 200 km Core 5,200 km (3,100 mi.), 4,300˚C Inner core (solid)
  19. 19. Earth’s Interior Divisions Earth's Interior Divisions Layer Outer Approx. Compos Name Radius Temp. ition in km Inner 1229 7000 deg. C Solid Core Iron Outer 3484 5000 deg. C Liquid Core Iron Lower 5700 2000 deg. C Iron- Mantle rich Rock Upper 6360 500 deg. C Iron- Mantle rich Rock Crust 6371 0 deg. C Basalt, Granite
  20. 20. WHAT GEOLOGIC PROCESSES OCCUR WITHIN THE EARTH’S INTERIOR?
  21. 21. Geological Processes  Plate Tectonics  Heat Transfer  Soil Erosion  Mineral Deposition
  22. 22. Fig. 1-10, p. 16
  23. 23. Fig. 1-11, p. 17
  24. 24. Fig. 1-12, p. 18
  25. 25. Connections between the Plates and Earth Systems Table 1-3, p. 18
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