Changes Due to Earthquakes

• Earth's layers


  • First layer (crust)
  • Middle layer (mantle)
  • Central layer (core)
• First layer (crust)


  Made up of several large and small plates
• Middle layer (mantle)


  Widest layer of the Earth, made up of magma
• Central layer (core)


  Divided into a liquid layer and a solid layer
• You will learn more about the Earth's layers in later grade levels
• Movement of plates on the crust


  Often accompanied by earthquakes and volcanic eruptions
• Earthquake


  The shaking of the ground
• How earthquakes happen


  Crustal plates move, rocks break and slide past each other, waves of energy are released and sent out through the Earth
• Types of earthquakes


  • Volcanic
  • Tectonic
• Volcanic earthquake


  Happens with a strong volcanic eruption
• Tectonic earthquake


  Caused by the movement of the earth's crust, may occur above the ground or beneath the ocean
• Earthquake magnitude


  Refers to the amount of energy released by an earthquake from its focus