Earthquake

• Earthquake


  Is the shaking or trembling of the ground caused by the sudden movement of the rocks below the surface of the earth
• Crust


  Its made up of plates that resemble a giant puzzle that is made up of smaller pieces.
• Tectonic plates


  There are 20 plates along the surface of the earth that moves continuously and slowly
• Mantle


  is the layer underneath the crust.
• Oceanic plates


  is the plates under the ocean
• Tectonic plate boundary 


  Its when two adjacent tectonic plates bump, slide, or slip, an earthquake happens.
• Faults


  are lines or cracks in earths surface that are caused by the movement of the plates
• Seismology


  Is the study of seismic waves, or energy waves that cause earthquakes.
• Seismologist


  is the specialist in seismology
• Seismograph 


  is an instrument that seismologists use to record earthquakes
• Primary waves (P-waves)


  Is the fastest seismic waves and can move through any phase of matter.
• Secondary wave (S-wave)


  that only move through solids.
• Surface waves


  they are last to reach the seismograph, occurs longest
• Magnitude


  Refers to the size of the seismic waves that are recorded in the seismograph