Seismic Waves

• What produces seismic waves?

  Earthquakes
• What type of seismic waves are P-waves?

  Longitudinal
• How do P-waves travel through different materials?

  At different speeds through solids and liquids
• What type of seismic waves are S-waves?

  Transverse
• Why can't S-waves travel through liquids?

  Because they are transverse waves
• What does the absence of S-waves on the opposite side of the Earth suggest?

  The mantle has solid properties, outer core is liquid
• What are the two types of seismic waves mentioned?

  P-waves and S-waves
• What do P-waves indicate when detected on the opposite side of the Earth?

  There is a solid inner core
• What causes the shadow zones where no P-waves are detected?

  Refractions between layers
• What are the layers of the Earth as related to seismic waves?

  • Solid inner core
  • Liquid outer core
  • Mantle
• What is the path of S-waves through the Earth?

  They cannot travel through the outer core
• What is the path of P-waves through the Earth?

  They travel through both solids and liquids