oral

• Layers of the Earth

  • Crust
  • Mantle
  • Core
• Layers of the Mantle

  • Upper mantle
  • Outer core
  • Inner core
• The earth is divided into three layers: Crust, Mantle, and Core
• Crust


  The outermost shell of a terrestrial planet
• Crust


  • Made of light minerals such as silicon and aluminum
  • Continental crust
  • Oceanic crust
• Continental crust


  The outermost layer of Earth's lithosphere that makes up the planet's continents and continental shelves
• Oceanic crust


  The uppermost layer of the oceanic portion of the tectonic plates<|>Thin but very dense<|>Made of basalt
• Mantle


  The mostly-solid bulk of Earth's interior<|>Contains aluminum and silicon but also has other minerals such as magnesium<|>Where lava comes from
• Moho-Boundary


  Boundary between crust and mantle
• Perspectives on Disasters

  • Economic
  • Psychological
  • Physical Natural
  • Sociocultural
  • Political
  • Biological
• Geological Hazards


  Large-scale complex natural events that happen on land<|>Earthquakes, volcanic eruptions, landslides, and sinkholes
• Lithosphere


  The rigid, outermost shell of planet Earth<|>Includes the crust and the uppermost mantle
• Earthquake


  Abrupt motion of the earth's crust as a result of its energy being suddenly released in the form of seismic waves
• Seismicity


  The occurrence of earthquakes in a particular area over time collectively
• Types of Forces in Faults

  • Shearing
  • Tension
  • Compression
• Focus


  The place beneath the surface from which an earthquake is initiated
• Epicenter


  The point on the Earth's surface directly above the focus of an earthquake