SEMIFINALS ! (SCIENCE)

• The outermost layer of Earth 


  Crust
• Seperates the Crust and the Mantle


  Mohorovicic Discontinuity
• What are the most abundant elements in rocks?


  Silicon and Aluminum
• This layer covers most of the Weight of Earth


  Mantle
• Exhibits a plastic like behaviour and allows the lithosphere to float


  Asthenosphere
• Innermost layer of Earth


  Core
• The combination of silicon and oxygen is called?


  Sial
• The combination of silicon and magnesium is called?


  SIMA
• PHILVOCS

  Phillipine Institute of Volcanology and Seismology
• PAGASA 


  Philippine Atmospheric Geophysical Astronomical Services Administration
• When Earth's surface is broken up into different parts


  Tectonic Plates
• An area where 2 plates meet


  Plate Boundaries
• This causes seafloor spreading


  Move away from eachother
• When one plate is forced under the other


  Push against
• Is the bending of rock layers


  Folding
• Raised areas


  Anticline
• Is the formation of a crack in the ground


  Faulting
• Lowered areas


  Syncline
• Rising of earths crust


  Uplift
• Lowering of earths crust


  Subsidence
• Sideways movement of Earths crust


  Thrust
• Tension


  Pulling
• Compression


  Pushing
• Shearing 


  Force applied on all sides
• Earthquakes are what that release energy?


  Seismic Energy
• Are cracks in Earth's surface


  Faults
• A fault that forms when one plate moves downwards and away from another

  Normal Fault
• Fault formed when one plate is pushing into another


  Reverse Fault
• Fault when 2 plates are sliding against eachother

  Thrust Fault
• Reverse fault that has a low area of displacement


  Strike-Slip Fault
• Largest tectonic plate on earth 


  Pacific Plate
• goes in all directions

  shearing
• Waves that travel on surface


  Surface Waves
• Waves that move up and down


  Rayleigh Waves
• Waves that move sidewards


  Love waves
• Waves that travel through Earth's interior


  Body Waves
• Are waves that compress and exert, like a slinky and can travel through any matter at 8 km


  P Waves
• Are waves that start in the crust, and end in the outer core. 5 km per second


  S Waves
• Where Earthquakes originate

  Hypocenter or Focus
• Where earthquakes vibrations reach first


  Epicenter