hazardous earth

• outline the structure of the earth

  1. crust = lithosphere
  2. mantle = mesosphere
  3. outer core + inner core = endosphere
  4. interaction between crust and mantle = asthenosphere
• outline the structure of the earth - density, temp, type of material


  layers closer to the core = heavier metals + higher density (due to pressure) + higher temperature (due to proximity to core)

  • inner core = solid metal
  • outer core = liquid metal
  • mantle = solid rock with high plasticity + flows after a long period of time
  • lithosphere = solid rock
• evidence of this structure comes from seismic energy...

  • primary waves travel through all material
  • secondary waves cannot travel through liquid or gas