Our Earth

• Structure of The Earth:

  A) crust

  B) mantle

  C) outer core

  D) inner core

  
• Crust:

  thin and solid
• Mantle:

  • move slabs of crust called plates - convection currents
  • semi molten
• Outer Core:

  liquid iron and nickel
• Inner Core:

  • solid iron and nickel - due to pressure
  • 5500 degrees celsius
• Plate Boundary:

  boundary between 2 tectonic plates
• Destructive/Convergent Plate Boundary:

  • 2 plates pushing together
  • volcanoes and earthquakes
• Constructive/Divergent Plate Boundary:

  • 2 plates move apart from eachother
  • lava flows, volcanoes, earhtquakes
• Constructive/Transform Plate Boundary:

  • 2 plates slide alongside eachother
  • earthquakes
• Why do people live near tectonic plates?

  Environmental:

  • soils are fertile

  economical:

  • attract tourists - jobs
  • minerals found - mining jobs
  • cheaper living
  • cheap geothermal energy

  Social:

  • people don't want to leave loved ones
  • buildings are designed with disasters in mind
  • community is important
  • people think risk level is low
  • people think there are adequate warning
• Managing Volcanic Risks:

  Planning:

  • deciding what to do in the future

  Preparation:

  • acting on what you planned

  Prediction:

  • guessing based on other events