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Violent motions

  •  English    14     Public
    Earthquakes, Volcanoes, Storms, Tornadoes, and Hurricanes
  •   Study   Slideshow
  • The point beneath the earth's surface where rock breaks and causes an earthquake
    focus
  •  15
  • The point on earth's surface directly above the focus
    epicenter
  •  15
  • a type of seismic wave that compresses and expands
    P wave
  •  15
  • a type of seismic wave that moves side to side and up and down
    S wave
  •  15
  • the opening in a volcano through which magma and gases escape
    vent
  •  15
  • a gently sloping mountain made of lava released from nonexplosive eruptions
    shield volcano
  •  15
  • a steeply sloped volcano made of pyroclastic material from explosive eruptions
    cinder cone
  •  15
  • a tall, cone shaped mountain made of alternating layers of lava and pyroclastic material
    composite volcano
  •  15
  • a row of severe thunderstorms
    squall line
  •  15
  • a rapidly rotating column of air that extends from a cumulonimbus cloud and touches the ground
    tornado
  •  15
  • a scale used to rate tornado intensity
    Fujita scale
  •  15
  • a rotating storm system originating over warm waters with wind speeds of 74 mph or greater
    tropical cyclone
  •  15
  • a tropical cyclone forming in the Atlantic and eastern Pacific Oceans
    hurricane
  •  15
  • a wall of water that moves ashore when a hurricane strikes land
    storm surge
  •  15