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‘/Objective: Understand composition and properties of Earth’s interior by the behavior of seismic waves. Key Points Notes Images, Links, Videos Seismic Waves P Waves S Waves Focus Epicenter Seismologist -‐waves produced by earthquakes or through explosions -‐(Primary Waves) longitudinal seismic waves that can travel through solids, liquids, or gases and are the fastest type of seismic waves. -‐(Secondary Waves) transverse seismic waves that can travel only through solids and are slower than P-‐waves -‐point where part of the crust breaks loose and moves, causing an earthquake -‐point on surface of the Earth directly above the focus of an earthquake -‐ is the study of seismic waves, energy waves caused by rock suddenly breaking apart within the earth or the slipping of tectonic plates Seismic Waves Video On-‐Line Wave Simulation Focus and Epicenter Seismograph Reflection Refraction -‐ an instrument that measures and records details of earthquakes, such as force and duration -‐wave hits a dense material and bounces back -‐-‐change of direction of wave depending on material wave is traveling through -‐depending of density of material the wave will also change speeds Seismograph Reflection and Refraction
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