Science Quarter 1

• Earthquake


  A seismic event caused by the sudden release of energy stored in the earth's crust.
• S waves


  Elastic wave and are one of the two main types of elastic body waves, so named because the move through the body of an object.
• Continental volcanic arc


  Mountains formed in part by indigenous activity associated with subduction of oceanic lithosphere beneath a continent.
• Crust


  Outer portion of the Earth
• Continental Crust


  Thick part of the Earth's crust
• Oceanic crust 


  Thin part of the earth's crust located under the ocean
• Fault


  A break in a rock along which movement have occured
• Mid-ocean ridge 


  Continuous mass of land with long width and height on the ocean floor
• Plates


  Rigid sections of the lithosphere that move as unit
• Trench 


  a depression in the seafloor produced by subduction process
• Volcanic Arc


  Chain of volcanoes that develop parallel to a trench
• Divergent boundary


  Region where crustal plate are moving apart
• Convergent Boundary


  Two plates move toward each other
• Transform Boundary


  Two plates slide past each other
• P wave


  Travels faster than other seismic waves
• Epicenter


  The part of the earth's surface directly above the focus of an earthquake
• Hypocenter


  The focus of the earthquake/point of origin
• Seismology


  Study of earthquakes and seismic waves that around earth
• Seismograph 


  Record the motion of the ground during an earthquake
• Layers of earth

  • Crust
  • Mantle
  • Core