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8th grade science test 2

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  • What consists primarily of erupted volcanic ash and rock fragments held loosely together?
    Conder-cone volcano
  • A particle or block of solid volcanic ejecta is a
    pyroclast
  • What major type of fault occurs when rocks on one side of the fault are shoved over the rocks on the other side?
    thrust fault
  • The middle of the earth's three main layers is the
    Mantle
  • What is the point on the earths surface directly above where an earthquake begins?
    epicenter
  • The earthquake zone stretching from Southern Europe to Indonesia is the
    Alpine belt
  • What is the boundary line between the crust and the mantle called?
    MOHO
  • what is the most abundant element in the earth's crust?
    oxygen
  • The central portion of the earth is the
    core
  • The inner core of the earth is thought to be
    solid
  • the study of the earth
    geology
  • What is the fracture sone between stationary and moving rocks called?
    Fault
  • About 80% of the world's earthquakes occur in the
    circus-Pacific belt
  • What is the bottom of the mantle called?
    Core-mantle boundary or Gutenberg discontinuity
  • an instrument used to record the vibrations caused by an earthquake is a
    seismograph
  • at what point deep in the earth does an earthquake begin
    hypocenter
  • The scale used to measure the damage an earthquake does is the
    Moment magnitude scale
  • What type of volcano probably will not erupt again?
    Extinct volcano
  • What type of volcano that is inactive but can erupt again?
    Dormant volcano
  • What type of volcanic ejecta: hardened lava that forms rough jagged rocks with a crumbly texture?
    AA
  • The study of earthquakes
    seismology
  • The earth's outer layer made of solid rock is
    Crust
  • what is the area between the upper mantle and the lower mantle?
    transition zone
  • Earthquake waves can provide us with information about Earth's
    interior
  • what type of fold occurs when rocks buckle up to form an arch-like structure?
    anticline
  • What type of volcanic ejecta: solid particles less than 2mm in diameter
    volcanic ash
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